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 $29.00. 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 $56.00, what should be concluded based on the sample data? Test using .
A good way to think of it is in US quarters, 4 go into a dollar which is a whole or 100. Each quarter is 25 cents. Each quarter of a circle is 25%, so it would be 75%
