You wish to see the effect training has on your ability of your staff to master a new computer program. The mean difference in the time to do tasks before and after the training was 4 minutes with a standard deviation of 8 minutes for your sample of 12 employees who did the training

a) At the .01 level did the training have any effect? (p = .111)

b) Based on answer to a) what was the reason for the 4 minute change in time?

c) Interpret the p-value?

d) Based on a) was the training worth the time and expense? Explain

2. In a sample of 39 people who majored in economics 29 invested their money. In a sample of 52 people who majored in English 25 invested their money.

a) At the .05 level is there a difference in the % of economic and English majors in terms of investing their money? (p = .012)

b) How do you explain the 26% difference in the % 's of the two groups based on a)?