Question: The housing market continues to remain soft. Realtors have to work harder than ever before to eke out a living. The Don Sebastian Management Group thinks they have the answer. Based on years of social psychological research, Dr. Sebastian has developed a sales training program that he says will maximize sales in ANY type of economy. Because Dr. Sebastian’s consulting fee is irresponsibly high, you want proof before you write him out a fat check. He agrees to let you run an experiment to test his procedures after, of course, you sign a confidentiality agreement. Of the 100 territories you control, you pick 10 of the worst for the experiment. You record the average number of sales for each territory for last year and then send the entire sales force in each territory to the training. A year later, you look at the sales for those territories that received the training.

a. What type of test is this?

b. What are the null and alternative hypotheses?

c. Conduct the appropriate hypothesis test.

d. Do you reject or fail to reject the null hypothesis?

e. What do you conclude?