At a recent meeting, the manager of a national call center for a majo.pdf

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The manager of an internet bank's call center claimed the average past due amount for previously contacted customers was $23 or less. Other managers questioned this claim and suggested collecting sample data to test the statement statistically. A random sample of 67 customers' past due amounts was taken, with a known population standard deviation of $63. The summary asks to state the null and alternative hypotheses, calculate the test statistic and p-value to determine if the data supports the manager's statement.

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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 $23.00. 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 accompanying table 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 $63.00, what should be
concluded based on the sample data? Test using =0.05. Click the icon to view the data table.
State the appropriate null and alternative hypotheses. Choose the correct answer below. A.
H0:=23.00 B. H0:=23.00 C. H0:>23.00HA:=23.00HA:=23.00HA:23.00 D. H0:23.00 E.
H0:<23.00 F. H0:23.00HA:<23.00HA:23.00HA:>23.00 Calculate the test statistic. = (Round to
two decimal places as needed.) Calculate p value

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