8
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answer)
(Seepicture)
The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. Below is the Excel output for significance level 0.05 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.
A 0.3544
B.2.0115
t-Test: Two-Sample Assuming Unequal Variances
Hotel 1
2.214
C 0.2025
Variance
D 2.2140
Observations
Hypothesized Mean
Difference
df
t Stat
P(T<=t) one-tail
t Critical one-tail
P(T<=t) two-tail
t Critical two-tail
Hotel 2
2.0115
2.951657
20
0
Mean
3.57855
20
38
0.354386
0.362504
1.685953
0.725009
2.024394
What is the standardized value of the estimate of the mean of the sampling distribution for the difference between sample means?
