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.