If we wish to determine whether there is evidence that the proportion of successes is higher in group 1 than in group 2, the appropriate test to use is the:
A) z test
B) test
C) t-test with 2 degrees of freedom
D) F-test with 2 degrees of freedom
E) all of these

Question

Quizplus · Accepted Answer

The appropriate test for comparing the proportions of two independent groups is the z-test. The z-test is used when the sample size is large enough that we can assume a normal distribution for the sampling distribution of the proportion.

If We Wish to Determine Whether There Is Evidence That