10.136 [EX10-136] At the end of their first day at training camp, 10 new recruits participated in a rifle-

shooting competition. The same 10 competed again at the end of a full week of training and practice.

Their resulting scores are shown in the following table.

Recruit Time of Competition 1 2 3 4 5 6 7 8 9 10 First day 72 29 62 60 68 59 61 73 38 48 One week later 75 43 63 63 61 72 73 82 47 43 Does this set of 10 pairs of data show that there was a significant amount of improvement in the recruits’ shooting abilities during the week? Use

  0.05 and assume normality.