(Choose 1 answer)
(See picture)
A. 1.6860
B. -1.6860 and 1.6860
C. -2.0244 and 2.0244
D. 2.0244
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.
t-Test: Two-Sample Assuming Unequal Variances
Hotel 1
2.214
Hotel 2
2.0115
Variance
2.951657
20
0
38
3.57855
20
Observations
Hypothesized Mean
Difference
df
t Stat
0.354386
P(T<=t) one-tail
0.362504
t Critical one-tail
P(T<=t) two-tail
1.685953
0.725009 2.024394
Mean
t Critical two-tail
What is (are) the critical value(s) of the relevant hypothesis test if the level of significance is 0.05?
E28
