A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Transcribed Image Text:SCENARIO 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.
t-Test: Two-Sample Assuming Unequal Variances
Mean
Variance
Observations
Hotel 1
Hotel 2
2.214
2.951657
20
2.0115
3.57855
20
Hypothesized Mean Difference
0
df
38
t Stat
0.354386
0.362504
1.685953
0.725009
2.024394
P(T<t) one-tail
t Critical one-tail
P(Tt) two-tail
t Critical two-tail
Referring to Scenario 10-13, what is(are) the critical value(s) of the relevant hypothesis test if the level of significance is 0.05?
O2.0244
±1.6860
±2.0244
1.6860.
SAVE
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