A random sample of n = 81 measurements to test H_o: μ = 40 versus H_a:  μ ≠ 42, x-bar = 34 and σ = 18

Calculate the value of the test statistic z:

What is the rejection point at α = .10 and indicate if you would accept or reject H_o?

What is the rejection point at α = .05 and indicate if you would accept or reject H_o?

What is the rejection point at α = .01 and indicate if you would accept or reject H_o?

What is the rejection point at α = .001 and indicate if you would accept or reject H_o?

Calculate the p-value:

Do any of your above conclusions change on acceptance or rejection of H_o? 

How much evidence is there that the mean composite satisfaction does not equal 40?