# Mathematics

Question 1

An independent-measures t test produced a t statistic with df = 20. If the same data had been evaluated with an analysis of variance, what would be the df values for the F-ratio?

Answer

 a. 1, 20 b. 2, 20 c. 1, 19 d. 2, 19

Question 2

An analysis of variance comparing three treatment conditions produces dftotal = 24. For this ANOVA, what is the value of dfwithin?

Answer

 a. 3 b. 2 c. 21 d. 22

Question 3

A researcher uses analysis of variance to test for mean differences among four treatments with a sample of n = 6 in each treatment. The F-ratio for this analysis would have what df values?

Answer

 a. df = 3, 15 b. df = 4, 24 c. df = 3, 5 d. df = 3, 20

Question 4

For an analysis of variance comparing four treatments, MSbetween = 12. What is the value of SSbetween?

Answer

 a. 4 b. 48 c. 36 d. 3

Question 5

An analysis of variance produces SSwithin = 40 and MSwithin = 10. In this analysis, how many treatment conditions are being compared?

Answer

 a. 4 b. 5 c. 50 d. 30

Question 6

An analysis of variance comparing three treatment conditions produces dftotal = 24. For this ANOVA, what is the value of dfbetween?

Answer

 a. 2 b. 3 c. 22 d. 21

Question 7

An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment. For this study, the three sample totals are, T1 = 5, T2 = 10, and T3 = 15. What value would be obtained for SSbetween?

Answer

 a. 15 b. 5 c. 1 d. 10

Question 8

An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment. For this study, the three sample totals are, T1 = 5,  T2 = 10, T3 = 15, and 2 = 75 for the entire set of scores. What value would be obtained for SStotal?

Answer

 a. 15 b. 5 c. 10 d. 1

Question 9

The following table shows the results of an analysis of variance. Based on this table, what is the value for ?2, the percentage of variance accounted for?

 Source SS df MS Between 16 2 8 F = 2.00 Within 84 21 4 Total 100 23

Answer

 a. 16/100 b. 16/18 c. 84/100 d. 4/10

Question 10

The following table shows the results of an analysis of variance comparing two treatment conditions with a sample of n = 11 participants in each treatment. Note that several values are missing in the table. What is the missing value for the F-ratio?

 Source SS df MS Between xx xx 14 F = xx Within xx xx xx Total 154 xx

Answer

 a. 28 b. 2 c. 7 d. 14

Question 11

An analysis of variances produce SSbetween = 20, SSwithin = 30, and an F-ratio with df = 2, 15. For this analysis, what is the F-ratio?

Answer

 a. 30/20 = 1.50 b. 20/30 = 0.67 c. 10/2 = 5.00 d. 2/10 = 0.20

Question 12

An experiment compares three treatment conditions with a separate sample of n = 10 in each treatment. If the data are analyzed with ANOVA, the analysis would have dftotal = _____.

Answer

 a. 29 b. 28 c. 27 d. 30

Question 13

An independent-measures research study compares three treatment conditions using a sample of n = 10 in each treatment. For this study, the three samples have SS1= 10,  SS2 = 20, and SS3 = 15. What value would be obtained for MSwithin?

Answer

 a. 45/27 b. 45/3 c. 45/29 d. 45/30

Question 14

For an F-ratio with df = 2, 10, the critical value for a hypothesis test using a = .05 would be _____.

Answer

 a. 99.4 b. 4.1 c. 19.39 d. 7.56

Question 15

The following table shows the results of an analysis of variance comparing three treatment conditions with a sample of n = 10 participants in each treatment. Note that several values are missing in the table. What is the missing value for SStotal?

 Source SS df MS Between 20 xx xx F = xx Within xx xx 2 Total xx xx

Answer

 a. 30 b. 54 c. 22 d. 74

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