test 3 AA Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. For an ANOVA comparing three treatment conditions, what is stated by the alternative hypothesis (H1)? a. There are no differences between any of the population means. b. At least one of the three population means is different from another mean. c. All three of the population means are different from each other. d. None of the other choices is correct. ____ 2. On average, what value is expected for the F-ratio if the null hypothesis is true? a. 0 c. k – 1 b. 1.00 d. N – k ____ 3. A research study comparing three treatments with n = 5 in each treatment produces T1 = 5, T2 = 10, T3 = 15, with SS1 = 6, SS2 = 9, SS3 = 9, and SX2 = 94. For this study, what is SSbetween? a. 10 c. 34 b. 24 d. 68 ____ 4. An analysis of variance produces SSbetween = 30, SSwithin = 60, and an F-ratio with df = 2, 15. For this analysis, what is the F-ratio? a. 30/60 = 0.50 c. 15/4 = 3.75 b. 60/30 = 2.00 d. 4/15 = 0.27 ____ 5. If an analysis of variance is used for the following data, what would be the effect of changing the value of M1 to 20? Sample Data M1 = 15 M2 = 25 SS1 = 90 SS2 = 70 a. Increase SSbetween and increase the size of the F-ratio b. Increase SSbetween and decrease the size of the F-ratio c. Decrease SSbetween and increase the size of the F-ratio d. Decrease SSbetween and decrease the size of the F-ratio ____ 6. In general, what factors are most likely to reject the null hypothesis for an ANOVA? a. Small mean differences and small variances b. Small mean differences and large variances c. Large mean differences and small variances d. Large mean differences and large variances ____ 7. A two-factor study with two levels of factor A and three levels of factor B uses a separate group of n = 5 participants in each treatment condition. How many participants are needed for the entire study? a. 5 c. 25 b. 10 d. 30 ____ 8. The following data represent the means for each treatment condition in a two-factor experiment. Note that one mean is not given. What value for the missing mean would result in no A´B interaction? B1 B2 A1 20 30 A2 10 ? a. 10 c. 30 b. 20 d. 40 ____ 9. If a two-factor analysis of variance produces a statistically significant interaction, what can you conclude about the main effects? a. Either the main effect for factor A or the main effect for factor B is also significant b. Both the man effect for factor A and the main effect for factor B are significant c. Neither the main effect for factor A nor the main effect for factor B is significant d. The significance of the main effects is not related to the significance of the interaction ____ 10. What is indicated by a positive value for a correlation? a. Increases in X tend to be accompanied by increases in Y b. Increases in X tend to be accompanied by decreases in Y c. A much ...