A study was conducted to investigate whether there are regional differences in peanut butter preference in the United States. The country was divided into 7 geographic regions, and in each region, a random sample of peanut butter eaters was asked whether they preferred creamy or crunchy peanut butter. The responses were summarized in a 7-by-2 table of counts for each combination of geographic region and creamy or crunchy peanut butter preference. Which of the following tests is the most appropriate for the investigation? A two-sample tt-test for a difference between means A A two-sample zz-test for a difference between proportions B A chi-square test of homogeneity C A chi-square test of independence D A chi-square goodness-of-fit test E
A study was conducted to investigate whether there are regional differences in peanut butter preference in the United States. The country was divided into 7 geographic regions, and in each region, a random sample of peanut butter eaters was asked whether they preferred creamy or crunchy peanut butter. The responses were summarized in a 7-by-2 table of counts for each combination of geographic region and creamy or crunchy peanut butter preference.
Which of the following tests is the most appropriate for the investigation?
-
A two-sample tt-test for a difference between means
A -
A two-sample zz-test for a difference between proportions
B -
A chi-square test of homogeneity
C -
A chi-square test of independence
D -
A chi-square goodness-of-fit test
E
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