Maggy Mwangi
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A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected and their competition scores were recorded before and after the training. The results are shown below.
Subject A B C D E F G
Before 9.4 9.5 9.6 9.6 9.4 9.6 9.6
After 9.5 9.7 9.6 9.5 9.5 9.9 9.4
Do the data suggest that the training technique is effective in raising the gymnasts’ scores?
Perform a hypothesis test at the 5% significance level.