If we wish to determine whether there is evidence that the proportion of successes is the same in group 1 as in group 2, the appropriate test to use is A) the Z test. B) the χ² test. C) both A and B. D) neither A nor B.

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Quizplus · Accepted Answer

Both the Z test and the χ² test can be used to compare proportions between two groups. The Z test is used for comparing two proportions directly, while the χ² test is used for testing independence in a contingency table, which can also compare proportions.

If We Wish to Determine Whether There Is Evidence That