Quiz: Quiz 08 Course Hero CO umsl.instructure.com/courses/79773/quizzes/100318/take Apps Web Slice Gallery _ Imported From IE & Kronos WORKFOR... Renaissance Place Student Informati... Reading List chat Collaborations Account Triton Online Tutoring Dashboard NetTutor MyCourseEval Courses CUMULATIVE PROBABILITIES FOR THE STANDARD NORMAL DISTRIBUTION CUMULATIVE PROBABILITIES FOR THE STANDARD NORMAL DISTRIBUTION Cumulative Groups probability Entries in the table give the area under the Entries in this table curve to the left of the curve to the left of the = 1.25, the cumulative Cumulative z value. For example, fo probability is .8944. 2=-.85, the cumul probability is . 1977 . Calendar -09 :00 -01 .02 .03 206 _.08 -09 Eb -3.0 -0010 Inbox History ? Help K to work through these problems. Do not hit submit unless you have answered all 10 questions.Quiz: Quiz 08 Course Hero CO umsl.instructure.com/courses/79773/quizzes/100318/take Apps Web Slice Gallery _ Imported From IE & Kronos WORKFOR... Renaissance Place Student Informati... Reading List D Question 1 1 pts Account If u= 84.2 and o =16 , find the z-score for an observation of 71.4. Dashboard O -0.955 Courses O 0.8 Groups O -0.8 O -0.658 Calendar O 0.955 Eb O 0.658 Inbox History ? D Question 2 1 pts Help Use your normal table to find P(z > -1.46) . O .8554 O .6808 O .1446 O .3192 O .9279 K O .0721Quiz: Quiz 08 Course Hero umsl.instructure.com/courses/79773/quizzes/100318/take Apps Web Slice Gallery Imported From IE & Kronos WORKFOR... Renaissance Place Student Informati... Reading List D Question 3 1 pts Account If P(Z 2z) =.3228, find the value of z. (Use your normal table.) Dashboard O It is impossible to determine Courses O .406 Groups O -.46 O .46 Calendar O .6255 Eb O -406 Inbox History D ? Question 4 1 pts Help If X is normally distributed with / = 21.3 and a = 2.4, calculate the probability P(X > 17.1) . O .2451 1 O .9599 O .7549 K O .0401Quiz: Quiz 08 Course Hero umsl.instructure.com/courses/79773/quizzes/100318/take Apps Web Slice Gallery Imported From IE & Kronos WORKFOR... Renaissance Place Student Informati... Reading List Question 4 1 pts Account If X is normally distributed with / = 21.3 and a = 2.4, calculate the probability P(X > 17.1) . Dashboard O .2451 O 1 Courses O .9599 Groups Oo O .7549 Calendar O .0401 Eb Inbox History D Question 5 1 pts ? Help In 2009, the American Time Use Survey found that the average American spends 2.8 hours a day watching TV. Suppose the standard deviation is 0.9 hours and that TV time is normally distributed. If you are in the upper 10% of all TV watchers, at the minimum, how many hours do you watch on a typical day? O 3.61 O 6.049 O 3.952 O 1.152 K O 1.648Quiz: Quiz 08 X t Course Hero 6 C' 0 umsl.instructure.com , , Apps 6 Web Slice Gallery E imported From lE e Kronos WORKFOR... 6 Renaissance Place 6 Studentlnformati... Reading List 0 o 28'? Account CE Dashboard I) Question 6 1 pts Courses gs Groups 0 The number of minutes that passes until the next ballot is cast, Which of the following random variables would have an exponential distribution? 0 The number of minutes spent in a voting booth Calendar Q Q The number of ballots cast in 1 hour. 0 The number of Democratic votes out of 30 ballots 0 More than one of these describes an exponentially distributed random variable' 0 The number of ballots until a Democratic vote is cast. Z) Question 7 1 pts It takes the average mechanic 30 minutes to change the oil in 6 cars. If the time it takes a mechanic to change the oil in a car is exponentially distributed, what is the value of #? O 30 minutes 0 5 minutes per car 0 1/5 car per minute 1 Rn my minnmc Quiz: Quiz 08 Course Hero umsl.instructure.com/courses/79773/quizzes/100318/take Reading List Web Slice Gallery Imported From IE & Kronos WORKFOR... Renaissance Place Student Informati... Apps 180 car minutes 6 cars Account Dashboard D Question 8 1 pts Courses The time between unplanned shutdowns of a power plant has an exponential distribution with a Groups mean of 90 days. Find the probability that the time between two unplanned shutdowns is between 108 and 120 days. Calendar Use the following information to help you: Eb e- =.9048 e-* = .6703 e- =.4493 e-to = .2019 e" = .0498 Inbox e-0.167 = 8465 e-0417 = .6592 e-0.855 = .4346 e-1.667 = 1889 -3335 = 0357 -02 = .8187 e-0.45 = 6376 e-09 =.4066 e-1 =.1653 e-3.75 = 0235 History -0.25 = 7788 e-=.6065 e"=.3679 ez =.1353 e = .0183 e" =.0067 ? -0.267 = 7659 -0.6 - 5488 e-12 =.3012 -2.25 = 1054 e-03 =.7408 e-0.625 = 5353 e-125 = .2865 e-24 = .0907 er = .0024 Help -0.353 7165 e-0607 = .5134 -1.335 =2636 e= .0821 2- = .0003 e-0375 = 6873 e-0.75 = 4724 e- =.2231 e-20=.0695 -10 = .0000 O .0004 O .4352 F O .0930 O .0378 O Almost 0 KQuiz: Quiz 08 X t Course Hero 6 Apps 0 Account Dashboard Courses gs Groups Calendar C' 0 umsl.instructure.com . . . . 6 Web Slice Gallery E imported From iE e Kronos WORKFOR... 6 Renaissance Place 6 Studentlnformati... o .0376 Z) Question 9 1 pts A survey of business students resulted in the following information regarding the probability of genders of the individuals and their selected major: Management Marketing Others Total Male .20 .10 .325 .625 Female .05 .20 .125 .375 Total .25 .30 .45 1 Given that a person majors in marketing, what is the probability that the person is female? 0 .667 o .533 o .113 o .20 o .8 o .475 I) Question 10 1 pts O I 1.) Reading List Quiz: Quiz 08 X t Course Hero 0 6 C' 0 umsl.instructure.com ,,,,,, " i, , , , \" , , ' 1') Apps 6 Web Slice Gallery E imported From lE e Kronos WORKFOR... 6 Renaissance Place 6 Student Informati... Reading List Account 3 Question 10 1 pts to Dashboard When a baseball player is up to bat, the number of bases he earns is recorded. (For instance, an out = O, a single = 1, a home run = 4) The data below describes the number of bases earned overa = career. Courses gs Groups # of Bases Frequency 0 602 Calendar 1 133 2 41 3 4 4 12 Let X represent the number of bases earned, and p(x) represent the probability function, which is not shown above. The probability that a player earns 2 bases or more on his next at bat can be found by which of the following: 0 p(2)-P(3)-.v(4) O P(2)+p(3J+p(4) O 41+4+12 Q POI > 2) 0 More than one of these choices is correct. 0 None of the above