Not everyone does these the same way.

I look at hypothesis testing as a proof by contradiction.

I assume the null hypothesis to be correct and see if the data tells me it's wrong.

Hence I want to prove the alternative hypothesis.

In this case we want to prove that .8 is too high, hence

=.8" alt="H_0=.8" /> vs. <.8" alt="H_a<.8" />

This absolute vale, seems to hint at a two-sided test, whihc I don;t agree with.

My test stat would be

which is close to a normal since n=200.

Here and