Reference no: EM132856722

A researcher is interested whether a training course increases the teaching performance of the teachers who attended the training courses. Test at 10% level of significance. The data are shown below:

Case Before After Case Before After

1 85 95 11 89 97
2 84 98 12 87 98
3 86 97 13 82 95
4 87 92 14 81 95
5 89 96 15 86 92
6 82 93 16 89 91
7 80 94 17 89 94
8 84 95 18 84 95
9 86 90 19 85 96
10 82 82 20 88 97