TABLE 10-10 The following EXCEL output contains the results of a test to determine if the proportions of satisfied guests at two restaurants are the same or different. -Referring to Table 10-10, if you want to test the claim that "Restaurant 1 (Group 1) has a lower proportion of satisfied customers compared to Restaurant 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) a χ² test for the difference between two proportions.

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Quizplus · Accepted Answer

To test the claim that one proportion is lower than the other, we need to use a one-tailed test. Since the sample sizes are large (n1 = 300 and n2 = 400) and we have the population standard deviations, we can use a z-test for the difference between two proportions.

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