A group in favor of freezing production of nuclear weapons believes that the pro

Question

A group in favor of freezing production of nuclear weapons believes that the proportion of individuals in favor of a nuclear freeze is greater for those who have seen the movie "The Day After" (population 1) than those who have not (population 2). In an attempt to verify this belief, random samples of size 500 are obtained from the populations of interest. Among those who had seen "The Day After", 228 were in favor of a freeze. For those who had not seen the movie, 196 favored a freeze.

Which test should be used?

T test for the difference between two proportions

Z test for proportions

T test for proportions

Z test for the difference between two proportions

T test for the difference between two proportions

Z test for proportions

T test for proportions

Z test for the difference between two proportions

Explanation / Answer

Because two populations are to be compared, difference of two proportions test is to be used.

And sincxe the sample size 500 is large (greater than 30) z test can be used.

So the required answer is Z test for the difference between two proportions.

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