Need help answering these 15 questions! thank you! 1. A repeated –measures analy

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Need help answering these 15 questions! thank you!

1. A repeated –measures analysis of variance with a sample of n=8 participants, produces df within treaments=14. What is the value for df error for this analysis?

a.7

b.cannot determine without additional info

c. 6

d. 21

2. In a repeated-measures ANOVA, which of the following is not computed directly but rather is obtained by a process of subtraction?

a. SSbetween treaments

b. SSwithen treatments

c. SSbetween subjects

d. SS error

3. The results of a repeated-measures ANOVA are reported as follows, F (3,27)=1.12> .05. How many subjects participated in the study?

a. 36

b. 40

c. 10

d. 9

4. Which of the following accurately describes the two stages of a repeated-measures analysis of variance?

a. the first stage removes individual differences from the numerator of the F-ratio and the second stage is identical to the independent measures analysis

b. the first stage removes individual differences from the denominator of the F-ratio and the second stage is identical to the independent measures analysis

c. The first stage is identical to the independent-measures analysis and the second stage removes individual differences from the numerator of the F-ratio

d. The first stage is identical to the independent-measures analysis and the second stage removes indidivual differences from the denominator of the F-ratio

5. For a repeated-measures ANOVA, how is the value of dferror computed?

a. (N-k)-(n-1)

b. n-1

c. k-1

d. (N-1)

6. A two factor study with two levels of factor A and three levels of factor B uses a separate sample of n=5 participants in each treatment condition. How many participants are needed for the entire study?

a. 25

b. 30

c. 10

d. 5

7. in a two-factor ANOVA, which of the following is not computed directly but rather is found by subtraction?

a. SSbetween treatments

b. SSAxB

c. SSA

d. SSB

8. IN a two-factor analysis of variance, the F-ratios for the factor A, B and the AxB interaction

a. all have the same df values and they all have the same denominator

b. all have the same df values but they may have different denominators

c. may have different df values but they all have the same denominator

d. may have different df values and may have different denominators

9. What is the appropriate denominator for the F-ratio for a repeated measures anova?

a. variance within treatments

b. the variance that remains after the variance between subjects is subtracted from the variance within treatments

c. variance between subjects

d. the variance that remains after the variance within treatments is subtracted from the variance between subjects

10. For two-factor study with 3 levels of factor A and 4 levels of factor B with a sample of n=5 in each treaments condition, what is the value for df withen?

a. 60

b. 12

c. 48

d. 24

11. For the repeated measures ANOVA, SS error is founded by

a. SSbetween treatments- SS within

b. SStotal-SSbetween treatments

c. SSwithin-SSbetween subjects

d. SSbetween treatments- SSbetween subjects

12. A two-factor research study is used to evaluate the effectiveness of a new blood-pressure medication. In this two-factor study, factor A is medication versus no medication and factor B is male versus female. The medicine is expected to reduce blood pressure for both males and females, but it is expected to have a much greateer effect for males. This expectation should result in

a. both a significant main effect for factor A medication and a significant interaction

b. a significant main effect for factor A medication

c. neither a significant main effect for factor A medication and a significant interaction

d. a significant interaction

13. A repeated measures study uses a sample of n=10 participants to evaluate the mean differences among four treatment conditions. In the analysis of variance for this study, what is the value for df between subjects

a. 27

b. 9

c. 36

d. 39

14. IN the F-ratio for a repeated measures ANOVA, variability due to individual differences

a. is automatically eliminated from the numerator but must be computed and subtracted out of the denominator

b. is automatically eliminated from both the numerator and denominator

c. must be computed and subtracted out of the numerator and denominator

d. is automatically eliminated from the denominator but must be computed and subtracted out of the numerator

15. The results of a two-factor analysis of variance produce df=2,28 for the f=ratio for factor A, and df= 2,28 for the F-ratio for the AxB interaction. Based on this information, how many levels of factor b were compared in the study?

a. 2

b. cannot be determined without additional info

c. 3

d. 1

Explanation / Answer

10. There are 3 levels of factor A and 4 levels of factor B with a sample of n=5

So, answer is 3*4*5 = 60

Answer is 60

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