1. A researcher performs a 2 3 ANOVA with five participants in each cell of the study design. What is the degrees of freedom for the interaction? 3 6 5 2 2. The following source table depicts the results of a fictional study investigating whether the number of hours of sleep a person gets varies with gender (male or female) and with the number of cups of coffee consumed in a day. Equal numbers of men and women were randomly assigned to drink one, two, or three cups of coffee during the course of a day and then record the number of hours they slept that night. Table: Coffee and Sleep Source Gender Cups of Coffee Gender Cups Within Total SS 0.25 81.556 2.667 26.5 110.972 df 1 2 2 30 35 MS 0.25 40.778 1.33 0.883 F 0.283 46.18 1.51 Reference: Ref 14-5 From the table Coffee and Sleep, using a p level of 0.05, what are the significant effects? a main effect of the number of cups of coffee and an interaction between gender and the number of cups of coffee a main effect of gender and a main effect of the number of cups of coffee. a main effect of gender and an interaction between gender and the number of cups of coffee a main effect of the number of cups of coffee and no other effects 3. In a twoway ANOVA, if there is a significant interaction: at least one of the main effects is significant. the interpretation of any significant main effects should be ignored. the interpretation of significant main effects is independent of the interaction. both of the main effects are also significant. 4. An assumption for using hypothesis testing for Pearson correlation is that one variable should vary equally at each level of the other variable. What is the easiest way to determine whether this assumption has been met? Conduct a post hoc test following the calculation of r. Calculate the cross-products of the deviation scores. If the result is positive, then the assumption has been met. Draw a scatterplot to see whether the range of values is equal across all values of the other variable. Review the value of r. If it is high, then the assumption has been met. 5. In a hypothetical study, researchers found that the average donut sold by Krispy Kreme contains 260 calories, with a standard deviation of 35 calories. At stores where calorie information was located next to the menu items, the average donut sold contained only 240 calories. Based on this information, Cohen's d equals: -.57 .57 -1.75 1.75 6. A Mann-Whitney U test is used to compare two groups of 18 on ranked athleticism. Which of these U test statistics would be considered significant? 121 115 91 100 7. A Spearman's correlation coefficient can range from _____ to _____. -1.00; 1.00 0; 1.00 -1.00; 0 -10.00; 10.00 8. A researcher is interested in knowing whether circadian rhythms influence participants' performance on different kinds of memory tests. Each participant is first classified as a morning person or an evening person and then randomly assigned to receive either an implicit or an explicit memory test. The researcher then tests everyone at 8 A.M. How should the ANOVA used to analyze the data be labeled? 2 2 within-groups ANOVA 2 2 between-groups ANOVA 4 2 within-groups ANOVA 4 2 between-groups ANOVA