MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A manager of the credit department for an oil company would like to determine whether the mean monthly balance of credit card holders is equal to $75. An auditor selects a random sample of 100 accounts and finds that the mean owed is $83.40 with a sample standard deviation of $23.65. If you were to conduct a test to determine whether the mean balance is different from $75 what is your conclusions (alpha=0.01)?
Select one:
a.
There is evidence that the mean balance is not $75.
b.
There is not evidence that the mean balance is not $75.
c.
There is evidence that the mean balance is $75.
d.
There is not evidence that the mean balance is $75.
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