Chapter 12 Practice Questions 1. A __________________ is a hypothesis test that includes two nominal independent variables and an interval dependent variable, and a __________________ is a statistical analysis used with one interval dependent variable and at least two nominal independent variables. a) factorial analysis of variance; two-way ANOVA c) two-way ANOVA; factorial ANOVA b) one-way ANOVA; factorial ANOVA d) between-groups ANOVA; within-groups ANOVA 2. A study evaluated the effects of both gender and socioeconomic status on self-reported stress levels. What ANOVA would best be suited to analyze the data from this study? a) 2-way ANOVA c) within-groups ANOVA b) between-groups ANOVA d) 1-way ANOVA 3. How many F statistics are produced in a two-way ANOVA? a) 3 b) 2 c) 6 d) 1 4. ______________ refers to the means of the rows and the columns in a table that shows the cells of a study with a two-way ANOVA design. a) Standard error of the mean b) Grand mean c) Marginal mean d) Sample mean 5. What type of interaction, if any, does the figure below best illustrate? a) a quantitative interaction b) a parallel interaction c) a qualitative interaction d) There is no interaction in the figure. 6. When you get your output from a two-way, which F statistic, if it is significant, should you first interpret? a) main effects b) placebo effects c) null hypothesis d) interaction effects 7. If you construct a graph of the means from a research study with a two-way factorial design and you see that the two lines in your graph intersect, this means: a) there is an interaction effect. c) you have two main effects. b) there is not an interaction effect. d) you have no main effects. 8. What type of interaction, if any, does the figure below best illustrate? a) a quantitative interaction b) a parallel interaction c) a qualitative interaction d) there is no interaction in the figure 9. Which of the following is the correct formula for degrees of freedom for the interaction effect of a betweensubjects factorial design? a) df interaction = (df rows) + (df columns) c) df interaction = N rows - 1 b) df interaction = (df rows) (df columns) d) df interaction = N columns - 1 10. For a two way ANOVA, which statistic do we use to calculate effect size? a) R2 b) df c) F d) SS Chapter 11 Practice Questions 1. An ANOVA stands for: a) analysis of variance. b) analysis of operative variability. c) analysis of covariance. d) analysis of associated variance. 2. Below is the F statistic which indicates the ratio of two measures of variability. If the within-groups variance is much larger than the between-groups variance, we can infer that: between-groups variance F= within-groups variance a) the sample means are different from one another. b) there is no difference between the sample means. c) the sample means are equal to one another. d) the sample means are not different from one another. 3. __________________ is a hypothesis test in which there are more than two samples and each sample is composed of different participants. a) Mixed factors ANOVA b) Between-groups ANOVA c) Within-groups ANOVA d) Factorial ANOVA 4. The table below provides the assumptions for ANOVA. If variances between groups are equal, we refer to this as: a) standardized coefficient. b) standard error of the mean. c) pooled variance. d) heteroscedasticity. 5. The formula for the degrees of freedom for a between-groups ANOVA is: a) df = N-1 c) dfbetween = dfwithin + 1/N b) df = N-1 + dfbetween/dfwithin d) dfbetween = Ngroups - 1 6. The figure below provides three different distributions. Based on a visual inspection of these distributions, which would give you the best outcome for an ANOVA? a) a b) b c) c d) a and c 7. The source table below provides us with information necessary to conduct an ANOVA. What previously learned statistical measure best describes column 4 of the source table? a) standard deviation b) standard error of the mean c) variance d) pooled variance 8. ___________________ is a statistical procedure frequently carried out after we reject the null hypothesis in an analysis of variance. It allows us to make multiple comparisons among several means. a) A post-hoc test b) A parametric test c) A nonparametric test d) Null hypothesis 9. What are three frequently used post-hoc tests? a) ANOVA, Scheff and Tukey b) Bonferroni, Scheff and Tukey c) Tukey, split-halves and Cronbach's alpha d) Cronbach's alpha, Bonferroni and Tukey 10. It is advantageous to use a within-groups ANOVA compared to a between-groups ANOVA because with a within-groups ANOVA: a) there is a greater variance of scores. b) we have reduced error because the same participants contribute to each condition of the study. c) we are likely to have to include more research participants in the study. d) you are more likely to discover a research result that has cause-effect implications