1. ## statistics question

It is claimed that a particular training course will increase the sales of insurance sales persons by an extra 5 policies per week. A company sends 8 randomly selected sales persons to attend the course. The weekly sales of these people before and after the course are listed below. Does the sample data support the claim? Assume a=0.10.

sales person sales before sales after
1 28 35
2 30 36
3 35 40
4 42 52
5 37 39
6 38 49
7 39 53
8 34 38

2. Originally Posted by trukka
It is claimed that a particular training course will increase the sales of insurance sales persons by an extra 5 policies per week. A company sends 8 randomly selected sales persons to attend the course. The weekly sales of these people before and after the course are listed below. Does the sample data support the claim? Assume a=0.10.

sales person sales before sales after
1 28 35
2 30 36
3 35 40
4 42 52
5 37 39
6 38 49
7 39 53
8 34 38
Use a paired t-test.

3. I think we have to use the Neyman-Pearson Lemma to solve it