At a Recent Meeting,the Manager of a National Call Center

Multiple Choice

At a recent meeting,the manager of a national call center for a major Internet bank made the statement that the average past-due amount for customers who have been called previously about their bills is now no larger than $20.00.Other bank managers at the meeting suggested that this statement may be in error and that it might be worthwhile to conduct a test to see if there is statistical support for the call center manager's statement.The file called Bank Call Center contains data for a random sample of 67 customers from the call center population.Assuming that the population standard deviation for past due amounts is known to be $60.00,what should be concluded based on the sample data? Test using α = 0.10.

A) Because p-value = 0.4121 > alpha = 0.10,we do not reject the null hypothesis.
The sample data do not provide sufficient evidence to reject the call center manager's statement that the mean past due amount is $20.00 or less.
B) Because p-value = 0.4121 > alpha = 0.10,we reject the null hypothesis.
The sample data provide sufficient evidence to reject the call center manager's statement that the mean past due amount is $20.00 or less.
C) Because p-value = 0.2546 > alpha = 0.10,we do not reject the null hypothesis.
The sample data do not provide sufficient evidence to reject the call center manager's statement that the mean past due amount is $20.00 or less.
D) Because p-value = 0.2546 > alpha = 0.10,we reject the null hypothesis.