Use the information below to answer Questions Q1 and Q2.
The following information was obtained from matched samples. The daily production rates for a sample of workers before and after an information systems training session 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
Q1. Using the information above, the point estimate for the difference between the means of the two populations is:
a) -1
b) -2
c) 0
d) 1
Q2. Using the information above and the answer to Question 18, the correct statistical decision for a hypothesis test that the difference between the means of the two populations is equal to zero is:
a) The null hypothesis should be rejected.
b) The null hypothesis should not be rejected.
c) The alternative hypothesis should not be rejected.
d) None of the above