The amount of time required to reach a customer service representative has a hug

Question

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.

Q1: Referring to Scenario 10-13, which of the following represents the relevant hypotheses tested?

A) H0: µI- µIIL 0 versus H1: µI- µII< 0

B)H0: µI- µII= 0 versus H1: µI- µIIJ 0

C) H0: µI- µIIJ 0 versus H1: µI- µII= 0

D) H0: µI- µIIK 0 versus H1: µI- µII> 0

Q2: 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?

A) 2.0244

B) ±2.0244

C) 1.6860

D) ±1.6860

Hotel 1 Hotel 2 Mean 2.214 2.0115 Variance 2.951657 3.57855 Observations 20 20 Hypothesized Mean Difference 0 df 38 t Stat 0.354386 P(T<=t) one-tail 0.362504 t Critical one-tail 1.685953 P(T<=t) two-tail 0.725009 t Critical two-tail 2.024394

Explanation / Answer

1)here as we are checking only differnce and not higher or lower .

hence option B isB)H0: µI- µII= 0 versus H1: µI- µIIJ 0

2) as it is two tailed test

B) ±2.0244

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