Five samples of the material were tested in a structure, and the average interior temperature reported was as follows : 23.01, 22.22, 22.04, 22.62, and 22.59.
a) Test the hypotheses H0:u = 22.5 VS H1:u not equal 22.5, using a = 0.05 . Use the P- value approach.
b) Find a 95 % CI on the mean interior temperature.