15. For each of the questions below, mark whether the problem relates to a -test
ID: 2948770 • Letter: 1
Question
15. For each of the questions below, mark whether the problem relates to a -test or to a -test. Circle your answer a How many Kleenex should the Kimberly Clark Corporation package of issues contain? Researchers determined that 60 tissues is the average number of tissues used during a cold Suppose a random sample of 45 Kleenex users yielded the following data on the number of tissues used during a cold: mean .. 52 and standard deviation 22, if you were to conduct a test to determine whether there is evidence that the mean is different from 60, which test would you use? or b. The manager of the credit depaitment for an oil company would like to determine whether the average monthly balance of credit card holders is equal to $75. An auditor selects a random sample of 50 accounts and finds that the average owed is $83.40 with a standard deviation of $23.65. If you were to detennine whether the auditor should conclude that there is evidence that the average balance is different from $75, which test would you use? z or c. The markcting manager for an automobile manufacturer is interested in detennining the orproportion of new compact-car owners who selected the luxury trim package. The mauager : believes from previous information that the proportion is 0.30, Suppose that a survey of 200 new compact-car owers is selected and 79 indicated that they would have selected the luxuy triun package. If you were to conduct a test to determine whether there is evidence that the proportion is diferent from 0.30, which test would you use?Explanation / Answer
Solution15A:
H0:mu=60
H1: mu not =60
sample szie=n=45
sample standard deviation is given .
Use t test
Solution15b:
Ho:mu=75
H1:mu not =75
n=50
given sample standard deviation as s=23.65
use t test
Solutionc:
n=200
large sample
H0:p=0.30
H1: p not =0.30
its z test fro proportion
Use Z test.
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