1. Test of Independence

1. Is there a relationship between test scores of persons who have gone through a certain job training program and their subsequent performance on the job?

	Performance
Training scores		Poor	Fair	Good	Total
Below average	67	64	25	156
	Average	42	76	56	174
	Above average	10	23	37	70
	Totals	119	163	118	400

1. a. State the null and alternative hypothesis
2. b. Give the p-value
3. c. Give a conclusion for the hypothesis test.

2 Anova

7. The following are number of mistakes made on five occasions by word processor operators setting a technical report.

Operator 1	10	13	9	11	12
Operator 2	11	13	8	16	12
Operator 3	10	15	13	11	15
Operator 4	15	7	11	12	9

Perform an analysis of variance and decide at the 0.01 level of significance whether the differences among the four-sample means can be attributed to chance.

1. a. State the null and alternative hypothesis
2. b. Give the p-value
3. c. Give a conclusion for the hypothesis test.