[2] Followings are sample weights of 15 eggs from the GREEN Farm; 81, 82, 80, 83, 82, 80, 79, 82, 77, 84, 81, 82, 81, 82, 79 (in [gram]) First, check the sample mean = 81 and the sample standard deviation s=1.773.

Then determine whether the GREEN Farm eggs are larger(heavier) than average eggs of the country - which is 79.7 gram with significance level = 0.1. Do it again with = 0.05.

Finally do it again with = 0.01.

using Excel (T.DIST)