Probability Questions and Answers

points Scores on a university exam are Normally distributed with a mean of 78 and a standard deviation of 8 The professor teaching the class declares that a score of 70 or higher is required for a grade of at least C Using the 68 95 99 7 rule what percent of students score below 54 5 OOO 32 2 5 1600

Birth weights at a local hospital have a Normal distribution with a mean of 110 oz and a standard deviation of 12 oz The proportion of infants with birth weights above 125 oz is 0 233 0 141

each of these four most popular colleges in 2003 2 21 ming 16 ul som and phystal aterom tighwng Collage The percent of students graduating from either engineering or business is over 60 approximately 30 approximately 50

5 points The exam scores out of 100 points for all students taking an introductory statistics course are used to construct the following boxplot Exam Score O O O 100 80 09 40 20 Based on this boxplot the interquartile range is closest to 80 50 10 25

your answer Type an integer or a fraction

Thi poi s the set of all integers and M x x is an integer between 4 an h set is the complement of set M M x1x is an integer 3 or 31 M x 1 x is an integer s 4 or 2 30 M x x is an integer 4 or 30 M x x is an integer s 3 or 231

Female 2 14 Total 12 20 31 of a student is randomly chosen C nter your answer as a fraction I estion Help Video Post

At a university 12 of studer a Calculate the expected please do not round y b The university gym ope 21 students outside the to calculate the expect O No it is unlikely independent O Yes it is reasona mornings is a rep

100 109 is the bin width are the bin boundaries lower bound 2 lower bound 3 lower bound 4 lower bound 4 upper bound 3 blood pressure value of 92 would fall into which bin data value of 90 would fall into which bin

Score 0 12 0 12 answered Question 3 A recent study surveyed 1 389 households asking if the residents rented or ow included dependents The results are summarized below 1 or More Dependent No Dependents Total Homeowner 454 166 620 373 769 Total 850 539 1 389 a What number of households reported having 1 or more dependent and rent in the table Renter b What percent of the renters reported having no dependents Round your p places 196 c Someone uses the table and calculates percent 166 539 30 8 Which is the corr O 30 8 of people with no dependents reported being homeowners O 30 8 of people surveyed were homeowners with no dependents O 30 8 of homeowners reporting having no dependents O None of these are correct

X the number of CT resid What is the standard deviati O 1 183 residents O 1 331 residents O 1 241 residents O 1 302 residents O 1 266 residents O 1 347 residents Question Help Post to fo

Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children Find the probability of exactly three girls in ten births 0 117 0 03 0 3 0 09 15

Question 2 A CBS News poll conducted June 10 and 11 2006 among a those adults about their party affiliation Democrat Repub economy was changing getting better getting worse or table below Republican Democrat none better same worse 104 44 137 118 38 12 21 87 90 Express each of your answers as a percent rounded to two a What percent of survey respondents identified them b What percent of survey respondents thought the eco joint probability

97 12 alswered Question 1 MP A B 8 Male 5 Female 13 17 Giving a test to a group of students the grades and gen C 11 20 Total 18 25 31 Total 24 50 74 Round your answers to 4 decimal places If one student is chosen at random Find the probability that the student identifies as femal Find the probability that the student identifies as male Find the probability that the student identifies as male

question with that both resp Report the ans prob Question Help

The table summarizes results from Driver Intoxicated Yes No Pedestrian Intoxi Yes 42 215 If one of the pedestrian deaths is intoxicated Probability Please enter a decimal to 4 place

The probability is b A white ball is drawn The probability is c A yellow ball is drawn The probability is Question Help Post Submit Question

After giving a test to a grou Male Female Total B If a student was randomly Answer as a fraction or a de

4 Woman wins millions from Texas lottery for 4th time read the headline about Joan Ginther s amazing luck Wetenhall 2010 Two of the tickets were from the same store whose owner Bob Solis said This is a very lucky store Citing concepts from the chapter notes what would you tell Ginther and Solis about the roles that probability and coincidence played in their fortunate circumstances

2 Compute a z statistic for each of the following assuming the population has a mean of 100 and a standard deviation of 20 A sample of 43 scores has a mean of 101 b A sample of 60 scores has a mean of 96 A sample of 29 scores has a mean of 100 a C

3 Convert the following proportions to percentages a 0 0173 b 0 80 c 0 3719

1 A population has a mean of 250 and a standard deviation of 47 Calculate z scores for each of the following raw scores Explain what each z score means Draw a normal curve and show the location of each z score a 391 b 273 c 199 d 160

Let U a b c d e f g h i j k A b c d f h i B c d e h i C b e f g i Determine AU Cn B Select the correct choice and if necessary fill in the answer box to complete your c OA AU CnB 0 Use a comma to separate answers as needed OB AU Cn B is the empty set

11 Find an arc length parametrization of the curve defined as i 2 j 0 t j that has the same orientation as the given curve and for which the reference point corresponds to r r t

BANGUNIN SAHUR PAK mylab STAT1800 Business St

12 Self Driving Vehicle Groups of adults are randomly selected and arranged in groups of three The random variable x is the num ber in the group who say that they would feel comfortable in a self driving vehicle based on a TE Connectivity survey 44 X O 12 2 P x 0 358 0 439 0 179

14 Casino Games When betting on the pass line in the dice game probabilities for the number of bets that must be placed in order to of craps at the Mohegan Sun casino in Connecticut the table lists the have a win X 1 2 3 P x 0 493 0 250 0 127

11 Fun Ways to Flirt A sociologist randomly selects single adults for different groups of three and the random variable x is the num ber in the group who say that the most fun way to flirt is in person based on a Microsoft Instant Messaging survey X 0 omeluotto 1 2 P x 0 091 0 334 0 408

8 Male Color Blindness When conducting research on color blindness in males a researcher forms random groups with five males in each group The random variable x is the number of males in the group who have a form of color blindness based on data from the National Institutes of Health 60 bus elli X 0 1 2 3 4 5 P x 0 659 0 287 0 050 0 004 0 001 0

9 Pickup Line Ted is not particularly creative He uses the pickup line If I could rearrange the alphabet I d put U and I together The random variable x is the number of women Ted approaches before encountering one who reacts positively X 1 2 3 4 P x 0 001 0 009 0 030 0 060

MastaanINTIS estions 90 Correct 0 millan Learning Assignment Score Question 2 of 11 0 Two antigens antigen A and antigen B det below shows the percentage distribution of Red Cross 2016

Assignment Score Question 10 of 11 0 Rabies is a viral disease of man system causing encephalopathy documented cases of rabies for

E8 of 11 Questions 1 Question 3 of Attempts 2 Question 0 of Attempts 3 Question 1 of Attempts Assessment 4 Question 90 Correct 0 100 Correct 0 Assignment Score Question 8 of 11 ing 0 A couple wants to have three ch the gender of one child does not The future parents are wondering habiliti

S 90 Correct 0 an Learning Assignment Store Question 7 of 11 Probability is a measure of how given The probability value is

The data below represent commute times in minutes and scores on a well being survey Complete parts a through d below Commute Time minutes x Well Being Index Score y 5 15 25 40 50 72 105 69 0 67 6 66 3 65 0 64 1 62 7 59 0 a Find the least squares regression line treating the commute time x as the explanatory variable and the index score y as the response variable Round to three decimal places as needed

One disadvantage of having a Command Economic System is O Inefficient no incentive to work hard or be creative O O Poor quality shortages of goods Doesn t meet consumers needs wants O All of the Above

Use the contingency table to complete parts a through d below a Determine the probability of P A and C P A and C Round to two decimal places as needed Event C Event D Event E Event A 4 16 2 Event E 5 16 7

I The Transportation Security Administration TSA is responsible for airport safety On some flights TSA officers randomi select passengers for an extra security check prior to boarding One such flight had 76 total passengers 12 in first class and 64 in coach class Some of the passengers were surprised when none of the 10 passengers chosen for addition screening were seated in the first class The dotplot below shows simulated random selections of 10 passengers in 50 trials 0 1 3 2 Number of First Class Passengers a Explain what the dot at 4 represents 4 5 b Use the results of the simulation to estimate the probability that none of the first class passengers are selected for an extra security check Should the passengers be surprised that none of the 10 passengers chosen for screening were sated in first pla

Suppose that this same test was administered by a professional to 10 000 people in another country in which 7 of the population is infected with HIV In this population if someone tests positive with this new test what is the probability that the person is not infected with HIV Round to the nearest hundredth of a percentage point

A group fitness gym classifies its fitness class attendees by class type and member status The marketing team has gathered data from a random month in which there were 2020 class attendees The data is summarized in the table below Class Type and Member Status of Class Attendees Member 96 207 234 165 225 Class Type Barre Boot Camp Boxing Spinning Yoga Non Member 240 159 170 266 258

When ordering his new office equipment Joe must choose one of 7 monitors one of 5 printers and one of 6 desk chair styles Joe likes 3 of the monitors 4 of the printers and 4 of the desk chairs If Joe s boss randomly chooses his equipment for him what is the probability that Joe will like all the boss s choices Enter a fraction on round your answer to 4 decimal places if necessary

Mrs Burke s physics class has 109 students classified by academic year and major as illustrated in the table Mrs Burke randomly chooses one student to collect yesterday s work Mrs Burke s Physics Class Academic Year Physics Majors Freshmen Sophomores Juniors Seniors Sten 2 of 2 What is the probability that she colortra frochman 15 12 10 13 Non Physics Majors 11 17 12 19

and iz Question 14 of Use the Venn diagram to identify the population and the sample Choose the correct description of the population O A The ages of car owners in the state who have a mortgage OB The number of car owners in the state who have a mortgage

PN iz Determine whether the variable is qualita Telephone numbers The variable is because te

and iz Choose the correct answer below Question 20 of 3 What is an inherent zero Describe three examples of data sets that O A An inherent zero is a zero that implies none OB An inherent zero is a zero that occurs in the data set naturally OC An inherent zero is a value that the variable can take

K Identify the data set s le list of 1 213 social secu O A nominal OB ratio O C interval OD ordinal

ling and Quiz K Question 1 Identify the sampling technique used researcher for an airline interviews al

Determine whether the following value could be a probability nswer 2 Points 29 14

Mrs Burke s biology class has 131 students classified by academic year and major as illustrated in the table Mrs Burke randomly chooses one student to collect yesterday s work Mrs Burke s Biology Class Biology Majors Academic Year Freshmen Sophomores Juniors Seniors 15 18 17 15 Non Biology Majors 19 14 16 17 only the juniors2 Enter a fraction or

Suppose that your boss must choose five employees in your office to attend a conference in Jamaica Because all 13 of you want to go he decides that the only fair way is to draw names out of a hat What is the probability that you Jean Charles Linda and Dylan are chosen Enter a fraction or round your answer to 4 decimal places if necessary Answer 2 Points Keypad