TABLE 10-9
The following Excel output contains the results of a test to determine whether the proportions of satisfied customers at two resorts are the same or different.

-Referring to Table 10-9, if you want to test the claim that "Resort 1 (Group 1) has a lower proportion of satisfied customers compared to Resort 2 (Group 2)," you will use
A) a t test for the difference between two proportions.
B) a Z test for the difference between two proportions.
C) an F test for the difference between two proportions.
D) an F test for the ratio of two variances.

Question

TABLE 10-9
The following Excel output contains the results of a test to determine whether the proportions of satisfied customers at two resorts are the same or different.
 
-Referring to Table 10-9, if you want to test the claim that "Resort 1 (Group 1) has a lower proportion of satisfied customers compared to Resort 2 (Group 2)," you will use
A) a t test for the difference between two proportions. 
B) a Z test for the difference between two proportions. 
C) an F test for the difference between two proportions. 
D) an F test for the ratio of two variances.

Quizplus · Accepted Answer

A Z test for the difference between two proportions should be used to test the claim that one proportion is lower than the other. This is because the sample sizes are both relatively large and the data is binomial. The test statistic (Z) is used to compare the difference between the sample proportions to the null hypothesis that they are equal.

TABLE 10-9 The Following Excel Output Contains the Results of a Test