Statistics Questions

10 The table below shows the number of male and female students enrolled in nursing at a university for a certain semester A student is selected at random Complete parts a D Nursing majors Non nursing majors 1019 96 600 1722 696 2741 Total Males 1115 Females 2322 Total 3437 a Find the probability that the student is male or a nursing major P being male or being nursing major Round to the nearest thousandth as needed b Find the probability that the student is female or not a nursing major P being female or not being a nursing major Round to the nearest thousandth as needed c Find the probability that the student is not female or a nursing major P not being female or being a nursing major Round to the nearest thousandth as needed d Are the events being male and being a nursing major mutually exclusive Explain OA No because there are 96 males majoring in nursing OB No because one can t be male and a nursing major at the same time OC Yes because there are 96 males majoring in nursing OD Yes because one can t be male and a nursing major at the same time

The amount of syrup that people put on their pancakes is normally distributed with mean 62 mL and standard deviation 11 mL Suppose that 40 randomly selected people are observed pouring syrup on their pancakes Round all answers to 4 decimal places where possible a What is the distribution of X X NO 61 5 b What is the distribution of N c If a single randomly selected individual is observed find the probability that this person consumes is between 64 2 mL and 65 9 mL d For the group of 40 pancake eaters find the probability that the average amount of syrup is between 64 2 mL and 65 9 mL e For part d is the assumption that the distribution is normal necessary Yes No

The lengths of pregnancies in a small rural village are normally distributed with a mean of 268 days and a standard deviation of 17 days In what range would you expect to find the middle 68 of most pregnancies Between and If you were to draw samples of size 36 from this population in what range would you expect to find the middle 68 of most averages for the lengths of pregnancies in the sample Between and Enter your answers as numbers Your answers should be accurate to 1 decimal places

e 11 01 23 Course PROB STAT W APPS HON Martinez S1 2023 2024 The number of responses to a survey are shown in the Pareto chart The survey asked 948 adults how they would grade the quality of their public schools Each person gave one response Find each probability a Randomly selecting a person from the sample who did not give the public schools an A b Randomly selecting a person from the sample who gave the public schools a grade better than a D c Randomly selecting a person from the sample who gave the public schools a D or an F d Randomly selecting a person from the sample who gave the public schools an A or B a The probability that a randomly selected person did not give the public schools an A is Round to three decimal places as needed b The probability that a randomly selected person gave the public schools a grade better than a D is Round to three decimal places as needed c The probability that a randomly selected person gave the public schools a D or an F is Round to three decimal places as needed d The probability that a randomly selected person gave the public schools an A or B is Round to three decimal places as needed Number responding 400 300 200 100 301 252 243 93 CDBF Response

Question 4 of 14 4 A coin is tossed 1300 times and tails is observed in 702 of the tosses What is the empirical probability of heads Answer Previous Answer 46

stal plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery Plasma volume is influenced by the overall health and physical activity of an dividual Suppose that a random sample of 43 male firefighters are tested and that they have a plasma volume sample mean of x 37 5 ml kg milliliters plasma per kilogram body weight Assume that a 7 80 ml kg for e distribution of blood plasma a Find a 99 confidence interval for the population mean blood plasma volume in male firefighters What is the margin of error Round your answers to two decimal places lower limit upper limit margin of error b What conditions are necessary for your calculations Select all that apply On is large the distribution of volumes is uniform o is known Oo is unknown the distribution of volumes is normal c Interpret your results in the context of this problem O The probability that this interval contains the true average blood plasma volume in male firefighters is 0 01 O We are 99 confident that the true average blood plasma volume in male firefighters falls within this interval We are 1 confident that the true average blood plasma volume in male firefighters falls within this interval The probability that this interval contains the true average blood plasma volume in male firefighters is 0 99 d Find the sample size necessary for a 99 confidence level with maximal margin of error E 2 70 for the mean plasma yolume in male firefighters

At wind speeds above 1000 centimeters per second cm sec significant sand moving events begin to occur Wind speeds below 1000 cm sec deposit sand and wind speeds above 1000 cm sec me sand to new locations The cyclic nature of wind and moving sand determines the shape and location of large dunes At a test site the prevailing direction of the wind did not change noticeably However the velocity did change Sixty one wind speed readings gave an average velocity of x 1075 cm sec Based on long term experience a can be assumed to be 245 cm sec a Find a 95 confidence interval for the population mean wind speed at this site Round your answers to the nearest whole number lower limit Xcm sec upper limit Xcm sec 1012 89 1137 11 b Does the confidence interval indicate that the population mean wind speed is such that the sand is always moving at this site Explain No This interval indicates that the population mean wind speed is such that the sand may not always be moving at this site O Yes This interval indicates that the population mean wind speed is such that the sand may not always be moving at this site Yes This interval indicates that the population mean wind speed is such that the sand is always moving at this site No This interval indicates that the population mean wind speed is such that the sand is always moving at this site

The boxplot below shows salaries for Construction workers and Teachers Construction Teacher 20 25 30 35 40 Salary thousands of O Markos Jennie 45 50 Jennie makes the median salary for a construction worker Markos makes the median salary for a teacher Who makes more money How much more Hint Help Video 55

for 19 weeks and hired temporary help for 10 weeks During 6 weeks the company paid overtime and hired temporary help Complete parts a and b below a Are the events selecting a week that contained overtime wages and selecting a week that contained temporary help wages mutually exclusive No Yes b If an auditor randomly examined the payroll records for only one week what is the probability that the payroll for that week contained overtime wages or temporary help wages P overtime wages or temporary help wages Round to the nearest thousandth as needed

of Siblings 0 1 2 3 4 Frequency 6 8 6 7 The mean is Round all your answers to 4 decimal places where possible The median is The sample standard deviation is The first quartile is 5 7 10 The third quartile is 6 16 What percent of the respondents have at least 3 siblings 74 of all respondents have fewer than how many siblings Hint Using a Frequency Table Video on Using the T184 for Statistics Given a Frequency Table

A BIU A Cheaters scope of inference Exercise 1 5 introduces a study where researchers studying the relationship between honesty age and self control conducted an experiment on 160 children between the ages of 5 and 15 The researchers asked each child to toss a fair coin in private and to record the outcome white or black on a paper sheet and said they would only reward children who report white Half the students were explicitly told not to cheat and the others were not given any explicit instructions Differences were observed in the cheating rates in the instruction and no instruction groups as well as some differences across children s characteristics within each group a Identify the population of interest in the study 160 children between the ages of 5 and 15 80 children between the ages of 5 and 15 who were told not to cheat All children between the ages of 5 and 15 The researchers b Identify the sample for this study c Can the results of the study can be generalized to the population Should the findings of the study can be used to establish causal relationships 160 children between the ages of 5 and 15 All children between the ages of 5 and 15 80 children between the ages of 5 and 15 who were told not to cheat The researchers If the sample is randomly selected and representative of the entire population then the results can be generalized to the target population Furthermore since this study is observational the results cannot be used to infer causal relationships If the sample is randomly selected and representative of the entire population then the results can be generalized to the target population Furthermore since this study is experimental the findings can be used to infer causal relationships If the sample is randomly selected and representative of the entire population then the results can be generalized to the target population Furthermore since this study is observational the findings can be used to infer causal relationships If the sample is randomly selected and representative of the entire population then the results can be generalized to the target population Furthermore since this study is experimental the findings cannot be used to infer causal relationships 7 Editor Suggestions Showing MacBook Proy Ctri

The boxplot below shows salaries for CPAS and Actuaries in a town CPA T Actuary 30 40 50 60 70 Salary thousands of H 80 90 100 If a person is making the first quartile salary for a CPA his earning is equivalent to the

Suppose that the duration of a particular type of criminal trial is known to be normally distributed with a mean of 15 days and a standard deviation of 6 days Let X be the number of days for a randomly selected trial Round all answers to 4 decimal places where possible a What is the distribution of X X N b If one of the trials is randomly chosen find the probability that it lasted at least 11 days c If one of the trials is randomly chosen find the probability that it lasted between 17 and 20 days d 84 of all of these types of trials are completed within how many days Please enter a whole number

1 1 Migraine and Acupuncture A migraine is a particularly painful type of headache which patients sometimes wish to treat with acupuncture To determine whether acupuncture relieves migraine pain researchers conducted a randomized controlled study where 95 females diagnosed with migraine headaches were randomly assigned to one of two groups treatment or control 49 patients in the treatment group received acupuncture that is specifically designed to treat migraines 46 patients in the control group received placebo acupuncture needle insertion at non acupoint locations 24 hours after patients received acupuncture they were asked if they were pain free Results are summarized in the contingency table below please round answers to within one hundredth of a percent Pain Free Yes Pain Free No Total Treatment 13 36 49 Control 4 42 46 Total 17 78 95 a What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture b What percent of patients in the control group were pain free after 24 hours c At first glance does acupuncture appear to be an effective treatment for migraines Explain your reasoning OYes because more individuals in the treatment group were pain free after 24 hours O No because there were fewer people in the treatment group O no because more than half of the individuals in the treatment group still experience pain 24 hours later OYes because a higher percentage of individuals in the treatment group were pain free after 24

081 can For each situation determine which variable is the independent variable and which variable is the dependent variable A Your high school s basketball team which won 20 games finished the season higher in the standings than your rival high school s team which won 14 games The variables are number of games won and place in standings B In science class you observed that more sugar dissolved in a beaker of water when you heated the water The variables are amount of sugar dissolved and temperature of the water c A two carat diamond costs more than a one carat diamond The variables are number of carats and cost of the the diamond

This question 1 point s possible The accompanying table gives the gross domestic receipts for the top 10 movies Find the mean median and mode for each data set Explain which measure best describes a typical value in this distribution Find the mean Select the correct choice below and if necessary fill in the answer box to complete your choice OA The mean is Round to two decimal places as needed OB There is no mean for these data Find the median Select the correct choice below and if necessary fill in the answer box to complete your choice OA The median is Round to two decimal places as needed OB There is no median for these data Find the mode s Select the correct choice below and if necessary fill in the answer box to complete your choice Domestic Receipts of Top 10 Movies Movie Title Movie A Movie B Movie C Movie D Movie E Movie F Movie G Movie H Movie I Movie J Submit quiz OA The mode s is are Round to two decimal places as needed Use a comma to separate answers as needed B There is no mode for these data Which measure best describes a typical value in this distribution OA For this distribution the mean median and mode are equal so any value can be used to describe this distribution OB The mode best describes a typical value in this distribution since each value occurs roughly the same number of times OC The median best describes a typical value in this distribution since the distribution appears to be slightly asymmetrical and contains some extreme values pinal value in this distribution since the distribution is roughly symmetrical and does not contain any extreme values Print Total Gross millions 451 0 202 7 357 0 356 4 652 3 336 0 200 0 936 8 281 3 228 2 Done

Bet of Filles per galloh MPG for 60 foreign cars is given in the following frequency table Find the mean median and mode for these data 20 21 MPG Frequency 5 2 19 2 OA The median is Find the mean Select the correct choice below and fill in any answer boxes in your choice Use a comma to separate answers as needed OB There is no median for these data 22 4 OA The mode s is are 23 6 OA The mean is approximately Type an integer or decimal rounded to the nearest tenth as needed Use a comma to separate answers as needed OB There is no mean for these data Find the median Select the correct choice below and fill in any answer boxes in your choice Find the mode Select the correct choice below and fill in any answer boxes in your choice Use a comma to separate answers as needed B There is no mode for these data 24 7 25 8 26 8 27 3 28 7 29 5 30 3

Engineers must consider the breadths of male heads when designing helmets The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 6 4 in and a standard deviation of 1 2 in In what range would you expect to find the middle 95 of most head breadths Between and If you were to draw samples of size 59 from this population in what range would you expect to find the middle 95 of most averages for the breadths of male heads in the sample Between and Enter your answers as numbers Your answers chou

templot describes a certain data set The leaf unit 1 2 1138 3 235 4 5 12 64 Leaf unit 1 What is the shape of this distribution Skewed left Skewed right Symmetrical

1 7 2n 1 3 9 9 m 12 1 2 1 3 1 1 20 5

Question 2 of 5 2 What is the second coordinate of the point at the intersection of the line y 4x 4 and the y axis Answer Previous Answer 4

EQUATIONS 5 m 1 2 9m 5 2 x 10 7

According to the Oxnard College Student Success Committee report we believe that 28 of students struggle in the math classes because they don t spend more than 8 hours studying independently outside of a 4 unit class Assume this is the true proportion and you plan to randomly survey 89 students to investigate their study habits Show your answer to 4 decimal places if necessary 30 b What is the probability that the sample proportion more than 0 34 a What is the distribution of p p N c What is the probability that the sample proportion is between 0 3 and 0 34

3 Determine whether the following statement is true or false If it is false explain why The probability that event A or event B will occur is P A or B P A P B P A or B Choose the correct answer below A True OB False the probability that A or B will occur is P A or B P A P B OC False the probability that A or B will occur is P A or B P A P B O D False the probability that A or B will occur is P A or B P A P B P A and B

50 part time students were asked how many courses they were taking this term The incomplete results are shown below of Courses Frequency Relative Frequency Cumulative Frequency 1 2 3 10 h Whatr 13 27 a Complete the table 0 2 0 26 0 54 10 23 50

The table below shows the number of state registered automatic weapons and the murder rate for several Northwestern states x Y 11 8 8 6 6 7 3 5 2 8 2 8 2 1 0 7 11 4 9 9 7 6 7 6 6 5 8 4 8 14 x thousands of automatic weapons y murders per 100 000 residents Determine the regression equation in y ax b form and write it below Round to 2 decimal places A How many murders per 100 000 residents can be expected in a state with 3 7 thousand automatic weapons Answer Round to 3 decimal places B How many murders per 100 000 residents can be expected in a state with 8 1 thousand automatic weapons Answer Round to 3 decimal places

24 randomly selected students were asked the number of movies they watched the previous week The results are as follows of Movies 0 1 2 3 4 5 Frequency 5 4 4 2 3 6 Round all your answers to 4 decimal places where possible The mean is 3 25 The median is 3 5 The sample standard deviation is 1 7645 The first quartile is 2 The third quartile is 4 5 What percent of the respondents watched at least 2 movies the previous week

Now Compute the test statistic Use the formulas in the book lecture to calculate the correct statistic Round to two decimal places 2

First you ll have to calculate the SEM Use the values provided and the formula in the book lecture to calculate the SEM Put your value below Round your response out to two decimal places

ppm ted be are A food safety guideline is hat the ercury tish should be below 1 part per the amounts of mercury ppm found in tuna sushi sampled at different stores in a major city Construct a 99 confidence interval estimate of the mean amount of mercury in the population Does it appear that there is too much mercury in tuna sushi 0 51 0 83 0 10 0 98 1 30 0 49 0 94 What is the confidence interval estimate of the population mean ppm ppm Round to three decimal places as needed Does it appear that there is too much mercury in tuna sushi OA No because it is not possible that the mean is greater than 1 ppm Also at least one of the sample values is less than 1 ppm so at least some of the fish are safe OB Yes because it is possible that the mean is greater than 1 ppm Also at least one of the sample values exceeds 1 ppm so at least some of the fish have too much mercury OC No because it is possible that the mean is not greater than 1 ppm Also at least one of the sample values is less than 1 ppm so at least some of the fish are safe D Yes because it is possible that the mean is not greater than 1 ppm Also at least one of the sample values exceeds 1 ppm so at least some of the fish have too much mercury

Question 6 of 14 6 Suppose Z is a standard normal random variable Evaluate P Z 1 48 Round your answer to thenearest thousandths Answer Answer 0 069

Refer to the accompanying data display that results from a sample of airport data speeds in Mbps Complete parts a through c below Click the icon to view a t distribution table df Type a whole number b Find the critical value to 2 corresponding to a 95 confidence level tx 2 Round to two decimal places as needed c Give a brief general description of the number of degrees of freedom Tinterval a What is the number of degrees of freedom that should be used for finding the critical value t 2 13 046 22 15 x 17 598 Sx 16 01712719 n 50 D OA The number of degrees of freedom for a collection of sample data is the total number of sample values OB The number of degrees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values OC The number of degrees of freedom for a collection of sample data is the number of unique non repeated sample values The number of degrees of freedom for a collection of sample data is the number of sample values

A genetic experiment with peas resulted in one sample of offspring that consisted of 438 green peas and 156 yellow peas a Construct a 95 confidence interval to estimate of the percentage of yellow peas b Based on the confidence interval do the results of the experiment appear to contradict the expectation that 25 of the offspring peas would be yellow a Construct a 95 confidence interval Express the percentages in decimal form 0 262 p 0 264 Round to three decimal places as needed b Based on the confidence interval do the results of the experiment appear to contradict the expectation that 25 of the offspring peas would be yellow No the confidence interval includes 0 25 so the true percentage could easily equal 25 OYes the confidence interval does not include 0 25 so the true percentage could not equal 25

A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects After treatment with the drug 13 subjects had a mean wake time of 91 8 min and a standard deviation of 42 8 min Assume that the 13 sample values appear to be from a normally distributed population and construct a 90 confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments Does the result indicate whether the treatment is effective Find the confidence interval estimate www min o min Round to two decimal places as needed Does the result indicate whether the treatment is effective A Yes the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes OB No the confidence interval does not indicate whether the treatment is effective OC Yes the confidence interval indicates that the treatment is not effective because the interval does not contain 91 8 minutes OD Yes the confidence interval indicates that the treatment is effective because the interval does not contain 0 minutes OE Yes the confidence interval indicates that the treatment is effective because the interval contains 0 minutes OF Yes the confidence interval indicates that the treatment is effective because the interval does not contain 91 8 minutes G Yes the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes

Some states now allow online gambling As a marketing manager for a casino you need to determine the percentage of adults in those states who gamble online How many adults must you survey in order to be 99 confident that your estimate is in error by no more than three percentage points Complete parts a and b below a Assume that nothing is known about the percentage of adults who gamble online n 1843 Round up to the nearest integer b Assume that 17 of all adults gamble online n Round up to the nearest integer

An IQ test is designed so that the mean is 100 and the standard deviation is 12 fo the population of normal adults Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99 confidence that the sample mean is within 3 IQ points of the true mean Assume that o 12 and determine the required sample size using technology Then determine if this is a reasonable sample size for a real world calculation The required sample size is 106 Round up to the nearest integer Would it be reasonable to sample this number of students OYes This number of IQ test scores is a fairly large number O Yes This number of IQ test scores is a fairly small number O No This number of IQ test scores is a fairly small number O No This number of IQ test scores is a fairly large number

a What are the requirements for constructing a confidence interval estimate of o or o b How do the requirements from part a differ from the requirements for constructing a confidence interval estimate of c In the California Daily 4 lottery 4 numbers from 0 to 9 are randomly selected with replacement Can the methods of this section be used to estimate o for the numbers that are selected in this lottery Why or why not a Choose the correct answer below OA The sample must be from a normally distributed population and the sample size must be greater than 30 OB The sample must be a simple random sample OC The sample must be a simple random sample and the sample size must be greater than 30 OD The sample must be a simple random sample and the sample must be from a normally distributed population b Choose the correct answer below OA For confidence interval estimates of o or o the requirement of a normal distribution is less strict OB For confidence interval estimates of oor o the requirement of a normal distribution is stricter and the normality requirement cannot be waived for large samples OC For confidence interval estimates of o or o the requirement of a normal distribution is less strict and the normality requirement cannot be waived for large samples OD For confidence interval estimates of o or o the requirement of a normal distribution is stricter c Choose the correct answer below OA No The selected numbers are equally likely and have a uniform distribution not a normal distribution as required OB No The selected numbers are not equally likely and do not have a normal distribution OC Yes The selected numbers are not equally likely and have a normal distribution

Some states now allow online gambling As a marketing manager for a casino you need to determine the percentage of adults in those states who gamble online How many adults mus you survey in order to be 99 confident that your estimate is in error by no more than three percentage points Complete parts a and b below a Assume that nothing is known about the percentage of adults who gamble online n Round up to the nearest integer b Assume that 17 of all adults gamble online n Round up to the nearest integer

An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population of normal adults Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99 confidence that the sample mean is within 3 IQ points of the true mean Assume that o 12 and determine the required sample size using technology Then determine if this is a reasonable sample size for a real world calculation The required sample size is Round up to the nearest integer Would it be reasonable to sample this number of students 0 0 0 0 Yes This number of IQ test scores is a fairly large number Yes This number of IQ test scores is a fairly small number No This number of IQ test scores is a fairly small number No This number of IQ test scores is a fairly large number ha 45

Express the confidence interval 0 555 p 0 999 in the form pt E p E H

a What are the requirements for constructing a confidence interval estimate of o or o b How do the requirements from part a differ from the requirements for constructing a confidence interval estimate of c In the California Daily 4 lottery 4 numbers from 0 to 9 are randomly selected with replacement Can the methods of this section be used to estimate o for the numbers that are selected in this lottery Why or why not a Choose the correct answer below OA The sample must be from a normally distributed population and the sample size must be greater than 30 OB The sample must be a simple random sample OC The sample must be a simple random sample and the sample size must be greater than 30 OD The sample must be a simple random sample and the sample must be from a normally distributed population b Choose the correct answer below OA For confidence interval estimates of o or o the requirement of a normal distribution is less strict OB For confidence interval estimates of o or o2 the requirement of a normal distribution is stricter and the normality requirement cannot be waived for large samples OC For confidence interval estimates of o or o the requirement of a normal distribution is less strict and the normality requirement cannot be waived for large samples OD For confidence interval estimates of o or o2 the requirement of a normal distribution is stricter c Choose the correct answer below OA No The selected numbers are equally likely and have a uniform distribution not a normal distribution as required B No The selected numbers are not equally likely and do not have a normal distribution OC Yes The selected numbers are not equally likely and have a normal distribution

A political candidate has asked you to conduct a poll to determine what percentage of people support her If the candidate only wants a 3 margin of error at a 95 confidence level what size of sample is needed When finding the z value round it to four decimal places

The American Heart Association is about to conduct an anti smoking campaign and wants to know the fraction of Americans over 46 who smoke Step 1 of 2 Suppose a sample of 2172 Americans over 46 is drawn Of these people 434 smoke Using the data estimate the proportion of Americans over 46 wha smoke Enter your answer as a fraction or a decimal number rounded to three decimal places

Find the standard deviation for the group of data items 6 6 6 9 12 12 12 The standard deviation is Round to two decimal places as needed

PRES The standard deviation is Simplify your answer Round to two decimal places as needed www m minzuste MOBLEES ME DBALEEN 1103 THE ERSTATISTI CARDIGEMA HOMELINE C CATHERINES LOPPUNTADIEN 19 19 20 20 21 21 Find the standard deviation for the group of data SAN FER PERFET un cana Cara TENTO INTIELLE INTERESANTE MEGENGENEMUE UGANDA meg N INTERIAN PESANTREN CD TOURSEUNGS UNTE CAMERA CAME FLE BAG TEUTTON MONTALEGE CLOUDAN SPANIEN Hinnalen UTE APERTEER ONS r

point s possible Find the standard deviation for the group of data items Round to the nearest hundredth 6 6 6 9 12 12 12 OA 3 00 OB 9 00 OC 8 14 OD 2 85

Choose the correct answer below This question 1 point s possible Determine whether the statement makes sense or does not make sense and explain your reasoning The death rate from this new strain of flu is catastrophic because 25 of the people hospitalized with the disease have died 40 available until you s O A This makes sense because the sample of patients is representative of the entire population of patients suffering from the disease OB This does not make sense because the percentage of the hospitalized people is less than 50 OC This does not make sense because it is not clear whether the facts are derived from a sample of patients which is representative of the entire population of the patients suffering from the disease OD This makes sense because the percentage of the hospitalized people is less than 50

Describe what is misleading in the visual display of data below Marijuana Use Among College Students in the Last 30 Days Never Used 29 3 Not in Last 30 Days 10 Used 1 9 Days 5 5 Used 10 29 Days 3 5 Used All 30 Days 1 7 This question 1 point s possible Choose the correct answer below available until you s OA The title does not explain what is being displayed OB Colors on the chart are too light and distort the data OC The chart is too small O D The percentages do not add up to 100

Question 2 of 15 Next question A professor had students keep track of their social interactions for a week The number of social interactions over the week is shown in the following grouped frequency distribution How many students had at least 45 social interactions for the week The number of students was Type a whole number SILE int s possible This question 1 noint s possible Number of Social Interactions 15 19 20 24 25 29 30 34 35 39 40 44 45 49 50 54 55 59 60 64 Update Some acc available Frequency 5 13 13 12 14 11 8 5 0 4

Calculate the range population variance and population standard deviation for the following data set If necessary round to one more decimal place than the largest number of decimal places given in the data 14 11 7 12 17 9 7 17 8 15 Answer How to enter your answer opens in new window 2 Points Range Population Variance Copy Data Keypad Keyboard Shortcuts