Question 2 (1 point)
Exhibit 10-2
The following information was obtained from matched samples.
The daily production rates for a sample of workers before and after a training program are shown below.

Worker Before After
1 20 22
2 25 23
3 27 27
4 23 20
5 22 25
6 20 19
7 17 18

Refer to Exhibit 10-2. The point estimate for the difference between the means of the two populations is

Question 2 options:

1


0


-2


-1