Please see attachment.

1.Which of the following is a requirement for computing the F-ratio?

	random sampling
	a normal distribution
	comparing two or more independent means
	all of the above

2. In a one-way Analysis of Variance with three groups, the null hypothesis states:

	all of the means differ.
	1> 2 and 3.
	1 = 2 = 3.

3. A professor is interested in knowing if the number of absences a student has in the semester is a good indication of how well a student does on the final exam. At the end of the year, the professor compares absence rates and exam grades for eight students. The data she found are as follows.

Standard deviation of X	2.98
Standard deviation of y	10.62
Variance of X	8.86
Variance of y	110.4
Covariance of XY	-28.5

Calculate the Pearson's correlation coefficient (r).

	.83
		B) -.90
	.09
	.38

4. In an analysis of variance, the Mean squares between-group estimate of the population variance is 30 and the Mean squares within-group estimate is 25. What is the F ratio?

	(30 - 25)/30 = 0.17
	25/(30 - 25) = 5.00
	25/30 = .83
	30/25 = 1.20

5. After calculating the between group sum of squares and the within group sum of squares, the next step is to calculate the mean square between and the mean square within. This is achieved by

	calculating the average group mean.
	multiplying the between group sum of squares and the within group sum of squares.
	adding the between sum of squares and the within group sum of squares.
	dividing each sum of squares by its respective degrees of freedom.

6. If b = -3.22 and a = 98, a person scoring who missed 8 days of class (x = 8) would be predicted to have a Y score of:

	59%
	66%
	72%
	81%

7. What is the slope of the linear regression prediction equation if a person with 12 years of schooling earns $31,000 per year and a person with 13 years of schooling earns $32,500 per year?

	13
	12
	1,500
	2,500

8. in an ANOVA, if the MSB is 640 and the MSW is 110, what is the F ratio?

	.17
	6.82
	5.82
	704

9. If a = 3 and b = 5, a person scoring X = 8 would be predicted to have a score of:

	29
	23
	34
	43