Of the two hypotheses H0 and Ha in a test statisticians usua

Of the two hypotheses (H_0 and H_a) in a test, statisticians usually place the claim that they want to prove at H_a instead of H_0. Try to explain why. (extra point)

Solution

This is because we never accept H0, we only \"fail to reject null\", because in hypothesis testing we try to find evidence against H0, and when there is not sufficient evidence against it, we say it is plausible that H0 is true. This is not however not proof that H0 is true.