TABLE 10-13 The Amount of Time Required to Reach a Customer Service

Multiple Choice

TABLE 10-13
The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. Below is the Excel output from a study to see whether there is evidence of a difference in the mean amounts of time required to reach a customer service representative between two hotels. Assume that the population variances in the amount of time for the two hotels are not equal.

-Referring to Table 10-13, what is the standardized value of the estimate of the mean of the sampling distribution for the difference between sample means?

A) 0.2025
B) 0.3544
C) 2.0115
D) 2.2140