Statistics Questions and Answers

2 In a city a list was obtained from each of the 5 neighborhoods in town and five people were randomly chosen from each neighborhood to be interviewed by the city mayor Select an answer Select an answer Simple Random Sample Stratified Random Sample Cluster Random Sample Systematic Random Sample vspaper You want to survey the students for their opinions about a recent u have assigned to work on the newspaper you walk around the school t are available

5 There are 35 rides at a large theme park and a team of journalists wants to interview some customer The journalists randomly chooses 5 of the rides and interview all of the people exiting those rides Select an answer Select an answer Simple Random Sample Stratified Random Sample Cluster Random Sample Systematic Random Sample Convenience Sample structor

What sampling technique is being used in this scenario Voters are selected at random from an alphabetical list of all registered voters Cluster sampling simple random sampling stratified sampling systematic sampling

A college administrator wants to survey 250 students that attend her college to see if students are satisfied with the course offerings Match the strategies to their corresponding sampling techniques The administrator gets the complete list of students at the college and surveys every 50th students on the list The administrator stands by the front door of the admissions department and asks the first 250 students who walk in The administrator goes into 9 classes from many subject areas and asks all the students in each of these 9 classes The administrator researches the ethnic make up of the college and makes sure that the proportion of each ethnic group represented in the sample is the same as the corresponding proportion of that ethnic group at the college The administrator gets the complete list of students at the college and then uses a computer to randomly select 250 students She then surveys these 250 students a Systematic Sampling b Convenience Sampling c Stratified Sampling d Cluster Sampling

1 You work for a company as a quality control specialist You want to check the current production of products for defects Your factory has 5 different assembly lines At the end of the day you randomly choose two of the assembly lines and inspect each item produced by that assembly line Select an answer Select an answer Simple Random Sample Stratified Random Sample Cluster Random Sample Systematic Random Sample Convenience Sample d from each of the 5 neighborhoods in town and five people were random od to be interviewed by the city mayor

In a study the sample is chosen by dividing population by voting district and sampling everyone in the district selected What is the sampling method Simple Random Systematic Stratified Cluster O Convenience

3 You work for the school newspaper You want to survey the students for their opinions about a recent issue During the hour that you have assigned to work on the newspaper you walk around the school interviewing any students that are available Select an answer Select an answer Simple Random Sample Stratified Random Sample Cluster Random Sample Systematic Random Sample a quality control specialist You want to check the current production of nd of the day you assign a number to each item that was produced You and inspect the items that correspond to the randomly chosen numbers

A biologist is studying the plant diversity in 15 million acres of the Sierra Nevada Mountains He will count the number of species in 150 acres Match the strategies to their corresponding sampling techniques The biologist goes to 15 diverse locations that have 10 acres each and surveys all 10 acres for each of these 15 locations The biologist goes to his 150 favorite hiking places and looks at an acres along each trail The biologist enters the 15 million acres into a data base and had a computer randomly select 150 of these acres The biologist orders the 15 million acres by latitude and then surveys every 100000th acre on the list The biologist classifies the Sierras into 10 different ecological types and then makes sure that the proportion of each ecological type from the sample is the same as the proportion of that of the population a Convenience Sampling b Stratified Sampling c Cluster Sampling d Simple Random Sampling

A bank manager is interested in the average length of time that customers are willing to wait in line before they give up and leave the bank Match the vocabulary word with its corresponding example The 25 customers that the manager observed leave The average length of time that all customers will wait before leaving the bank The average length of time that the 25 customers waited before leaving the bank The list of times for the 25 customers who left the bank All of the bank s customers The length of time a customer waits before leaving the bank a Sample b Population c Parameter d Variable e Statistic f Data

A politician is interested in the proportion of voters in his district that think he is doing a good job Match the vocabulary word with its corresponding example The answer Yes or No that a voter gives when asked whether the politician is doing a good job All voters in the politician s district The proportion of all of the district s voters who think that the politician is doing a good job The proportion of the 900 voters surveyed think that the politician is doing a good job The 900 randomly selected voters that the politician surveyed The list of 900 Yes or No answers a Parameter b Data c Statistic d Variable e Population f Sample

A cardiologist is interested in the average recovery period for her patients who have had heart attacks Match the vocabulary word with its corresponding example All heart attack patients that the cardiologist has cared for or will care for in the future The average recovery time for all heart attack patients that the cardiologist has or will treat The list of all 32 heart attack patients recovery times The 32 heart attack patients who were observed by the cardiologist The recovery time for a heart attack patient The average recovery time for the 32 heart attack patients a Sample b Parameter c Data d Variable e Population f Statistic

Ski resorts are interested in the average age that children take their first ski and snowboard les They need this information to optimally plan their ski classes Match the vocabulary word with corresponding example The list of the 92 ages that the children from the study took their first lesson The 92 children who were asked when they took their first lesson All children who ski and snowboard The age that children take their first lesson The average age that all children take their first lesson The average age that the 92 children took their first lesson a Statistic b Population c Sample d Data e Variable f Parameter

Determine if the following is an example of descriptive or inferential statistics 300 female Osprey hatch lings were tracked until they died or succeeded in laying their own eggs Based on the data the researchers concluded that somewhere between 12 and 18 of all Female Osprey hatch lings in the US succeed in growing up to lay their own eggs O Inferential Statistics

What type of data is this Qualitative Categorical

Favorite Baseball Team Quantitative Discrete

In a study the data you collect is Temperature in Celsius What type of the data is this Quantitative Discrete O Quantitative Continuous

ing general TV viewing general TV viewing oneral TV viewing Next

Find the mean for this list of numbers Round to three decimal places if necessary 67 82 69 2388 36 2 23 27 Mean 31 90 96 37 42 63 16 92

square feet h a prediction cally low other factor that contributes to the rent price between two apartments one with 1 000 square feet for a monthly rent of 1 275 and the other with Next

Find the mode for this list of numbers 93 72 88 80 31 67 67 99 77 49 15 6 85 19 9

The mass of a whiffle ball varies usually between 40 and 50 grams You decide to gather a random sample of whiffle balls and record the mass of each Your data is displayed in the table below Units are grams 43 3 40 6 48 3 46 4 48 7 43 5 40 3 47 6 46 3 42 2 49 6 42 3 47 9 40 6 52 46 6 46 7 Checksum 819 8 You would like to describe a typical whiffle ball from your data set You decide to make several calculations describing the center of the data set Find the following and round to two decimal places a mean 46 9 b median

f you have the following test scores 72 66 72 84 66 and 78 what is your mean test score

Find the mode for this list of numbers 54 30 30 53 50 28 55 47 48 80

Final Exam list K Determine the upper tail critical value ta 2 in each of the following circu a 1 0 99 n 18 d 1 0 99 n 60 e 1 0 90 n 38 b 1 a 0 95 n 18 c 1 0 99 n 31 Click here to view page 1 of the table of critical values for the t distributi Click here to view page 2 of the table of critical values for the t distributi a t 2 9892 Round to four decimal places as needed b t 2 1098 Round to four decimal places as needed Round to four decimal places as needed d t 2 6618 Round to four decimal places as needed e t 1 6871 Round to four de places as needed c t

ss Statistics SP1 2023 xam K Question 13 of A recent survey identified the top accounting firms within 10 geographical regions across firms in these two regions included the number of partners in the firms Attached below i Click the icon to view the accounting firms data Use a comma to separate answers as needed Round to two decimal places as needed Choose the correct conclusion below OA Reject Ho There is insufficient evidence that the means differ B Do not reject Ho There ment evidence that the means differ OC Do not reject Ho There is cent evidence that the means differ O D Reject Ho There is sufficient evidence that the means differ

ess Statistics SP1 2023 Exam Find the sample size ne based on a previous rep The required sample size Should the sample be ob

Final Exam n list 11 12 K One year c below a What is t P X 25 b What is th

Final Exam n list 1 2 K An agent for a residential real estate company in a suburb located outside a maj goal the agent would like to use the size of an apartment as defined by square Complete parts a through f a Construct a scatter plot Choose the correct graph below A 2 000 0 A Rent 0 12 2 000 Size Sq ft Q Q OB A Rent 2 000 T 0 Monthly Rent Size Square Fee 0 Questio S 2 000 Size Sq ft Q Q b Use the least squares method to determine the regression coefficients bo an

STAT1800 Business Statistics SP1 2023 Test Final Exam MyLab Question list Question 1 Question 2 Question 3 K IfX 78 S 21 and n 36 and assuming that the population is norma Click here to view page 1 of the table of critical values for the t distribut Click here to view page 2 of the table of critical values for the t distribut 0S SO Round to two decimal places as needed Critical Va D Critical V For a parti the critical

3 How is the hatching of water python eggs influenced by the temperature of a snake s nest Researchers randomly assigned newly laid eggs to one of three water temperatures cold neutral or hot Hot duplicates the extra warmth provided by the mother python and cold duplicates the absence of the mother Suppose we select one of the eggs at random Nest temperature Hatching status Hatched Didn t hatch Cold 16 11 Neutral 38 18 a Find P Egg Hatched Hot Water Write your answer as a fraction and a percent Hot 75 29 093199 bra noilori 62619wING THE b If the chosen egg hatched what is the probability that it was assigned to cold water Write your answer as a fraction and percent

A bag has four balls labeled A B C and D One ball will be randomly picked and its letter will be recorded as the outcome Give the sample space describing all possible outcomes Then give all of the outcomes for the event of choosing the letter A If there is more than one element in the set separate them with commas Sample space 4 B C D Event of choosing the letter 4 0 0 X 5

7 As of 2018 the world population is 7 616 billion people and is growing at a rate of 1 1 per ye a Write and equation to model the population growth where P t is population in billions of people and t is time in years b What is the predicted population for 2050 c As of 2018 we have an excess of natural resources and are able to support a population of about 9 billion people However natural resources are being depleted at about 1 per year When will we no longer have enough natural resources to support the growing population

35 8 where Calculate the standard score of the given Xvalue X located Round the standard score to two decimal places Answer The point can be moved by dragging or using the arrow keys Select th

The following is a graph of two normal distributions plotted on the same x axis Answer 8 Based on the graph above which statement best describes the graph 12 Tables Ke O The two distributions have means that differ by 4 units and different standard deviations O The two distributions have equal means and standard deviations that differ by 4 units O The two distributions have means that differ by 4 units and equal standard deviations O The two distributions have equal means and equal standard deviations

X 64 2 62 5 and o 3 8 indicate on the curve where t er pint can be moved by dragging or using the arrow keys Select the R

body temperatures of a group of healthy adults have a bell shaped distribution with a mean of 98 25 F a dard deviation of 0 42 F Using the empirical rule find each approximate percentage below a What is the approximate percentage of healthy adults with body temperatures within 3 standard devi the mean or between 96 99 F and 99 51 F b What is the approximate percentage of healthy adults with body temperatures between 97 83 F and 98 67 F pproximately of healthy adults in this group have body temperatures within 3 standard deviations o n or between 96 99 F and 99 51 F e an integer or a decimal Do not round

e the following cell phone airport data speeds Mbps from a particular network Find P25 1 0 2 0 3 0 6 1 2 2 6 3 1 8 8 10 3 14 1 14 9 4358 8 0 1 0 4 1 8 5 3 12 8 0 2 0 4 2 1 7 1 13 2 0 2 0 5 2 2 7 9 13 4 Mbps 5 pe an integer or a decimal Do not round 0 2 0 6 2 3 8 2 13 7 0 3 1 1 2 8 9 7 14 4 0 3 1 2 3 2 10 5 15 1 0 3 1 2 3 11 26

a data set of the pulse rates for a sample of adult females the lowest pulse rate is 39 beats per minu me listed pulse rates is x 73 0 beats per minute and their standard deviation is s 12 6 beats per mil What is the difference between the pulse rate of 39 beats per minute and the mean pulse rate of the f How many standard deviations is that the difference found in part a Convert the pulse rate of 39 beats per minutes to a z score we consider pulse rates that convert to z scores between 2 and 2 to be neither significantly low n n is the pulse rate of 39 beats per minute significant The difference is beats per minute pe an integer or a decimal Do not round

earchers measured the data speeds for a particular smartphone carrier at 50 airports The highest spee asured was 76 1 Mbps The complete list of 50 data speeds has a mean of x 15 45 Mbps and a standa ation of s 37 01 Mbps What is the difference between carrier s highest data speed and the mean of all 50 data speeds How many standard deviations is that the difference found in part a Convert the carrier s highest data speed to a z score f we consider data speeds that convert to z scores between 2 and 2 to be neither significantly low no nificantly high is the carrier s highest data speed significant The difference is Mbps be an integer or a decimal Do not round MAX

6 049 6 050 6 099 6 100 6 149 6 150 6 199 6 200 6 249 6 250 6 299 6 300 6 349 6 350 6 399 4 18 12 10 3 1 Use the frequency distribution to construct a histogram Does the histogram appear to depict data that have a normal distribution Why or why not turhay O Frequency 104 5 Jouanbaly 20 15 10 5 0 61 6 1 6 2 Weight grams 6 3 6 4 Does the histogram appear to depict data that OA The histogram appears to depict a no generally decrease to a minimum a OB The histogram appears to depict a generally increase to a maximum roughly symmetric OC The histogram does not appea frequencies generally decrea

distribution using a strict interpretation of the relevant quency distribution appear to have a nemal criteria Does the frequency distribution appear to have a normal distribution 70 74 75 79 80 84 A Yes all the requirements are met B No the distribution does not appear to be normal C No the frequencies do not decrease from the maximum frequency to a low frequency

beginning with a lower class limit of 15 0 and use a class width of 6 0 Body Mass Index 15 0 20 9 21 0 26 9 27 0 32 9 33 0 38 5 39 0 44 9 Frequency 287 22 6 18 3 19 2 21 5 23 3 29 8 44 9 30 1 25 3 24S 281 25 1 377 348

Upload a complete solution to the following question The market value of a house is 425 500 in the West end of Kingston where the property tax rate is 0 01241250 MPAC the property to be worth 92 of the fair market value a What is the total annual property tax due on this property b Determine the property taxes for next year if the assessed value is expected to increase by 6 8 and the rate is increased by 27 c By what percentage change will the taxes increase Attach File Browse Local Files

A survey finds that customers are charged incorrectly for 1 out of every 30 items on average Suppose a customer purchases 14 items Find the following probability A customer is not charged incorrectly for any item The probability is 0 9045 Round to four decimal places as needed

1 You are provided with training and test data samples consisting of a single variable X and an observation Y consisting of two possible classes T and F Calculate the K nearest neighbors test error rate with K 4 for the test data Training Data i 1 2 3 4 5 not 6 7 8 9 10 I 1 60 Vi T 1 50 F 0 60 T TTRE 0 30 T 0 40 F 0 40 F 0 70 T 1 20 T FF 1 30 T 2 10 F Test Data i Ji M 1 3 F 2 0 9 F 3 12 T 1

The following is a frequency distribution for the ages of a sample of employees at a local company Age Frequency 30 39 40 49 50 59 60 69 70 79 7 4 8 5 1 a Determine the average age for the sample b Compute the variance Round your answer to two decimal places 7 5 x c Compute the standard deviation Round your answer to two decimal places d Compute the coefficient

Consider the following data Step 3 of 3 Calculate the value of the range 4 15 1 12 14

Consider the following sets of sample dat

the data set s level of measureme temperatures of 53 selected refrigerators O A interval OB ordinal OC ratio O D nominal

24 Identify the data set s level of measurem number of milligrams of tar in 66 cigaret OA ordinal OB nominal Oc intoniol