What does the CLT tells us about the distribution of Y¯ 2 – Y 1? A. Nothing because this is not the average of a sample. B. Because the Yij are approximately normal, so are the averages. C. Note that...

What does the CLT tells us about the distribution of Y¯ 2 – Y 1?

A. Nothing because this is not the average of a sample.

B. Because the Yij are approximately normal, so are the averages.

C. Note that Y¯ 2 and Y¯ 1 are sample averages, so if we assume N2 and N1 are large enough, each is approximately normal. The difference of normals is also normal.

D. The data are not 0 or 1, so CLT does not apply.