Question

Ten individuals are chosen at random, from a normal population and their (5)
eights (in kg) are found to be 63, 63, 66, 67, 68, 69, 70, 70, 71 and 71. In the
light of this data set, test the claim that the mean weight in population is 66 kg
at 5% level of significance.
[The following tά values are given]
degree of
freedom ά = 0.05 ά = 0.025
9 1.83 2.26
10 1.81 2.23