p. 397-400 #s 2, 5, 7, & 9

• For #9 read the question as: "For the SPSS output in Figure 15.8, report the findings, as demonstrated in class, for Instruction Type, Item Type, and Instruction Type by Item Type."
• For credit, show all work...for example, if asked to calculate a mean of two data points, type out:
• xbar = (10+19)/2 = 14.5
• consider bolding/changing the answer by bolding it.

2. An interaction tells you that __________.

a. there is an overall effect of your independent variable

b. the effect of one independent variable depends on the level of the other independent variable

c. neither of your independent variables affects your dependent variable

d. none of the above

Answer:

5. In a factorial experiment, an interaction between the independent variables will always be present.

a. True

b. False

Answer:

7. If you find a significant interaction in your factorial design, then the main effects must also be significant.

a. True

b. False

Answer:

9. For the SPSS output in Figure 15.8, write a results section in American Psychological Association (APA) style.

FIGURE 15.8 . SPSS Output for a Factorial Design + Univariate Analysis of Variance Between-Subjects Factors Value Label N Instruction_Type 1.00 Live Lecture 2.00 Online Lectures Item_Type 1.00 Multiple 6 Choice 2.00 Short Answer 6 Descriptive Statistics Dependent Variable: Test_Score Std. Instruction Type Item Type Mean Deviation N Live Lecture Multiple Choice 5.3333 .57735 Short Answer 10.6667 1.15470 Total 8.0000 3.03315 Online Lectures Multiple Choice 4.6667 57735 Go ww ww Short Answer 21.6667 2.88675 Total 13.1667 9.49561 Total Multiple Choice 5.0000 63246 Short Answer 16.1667 6.33772 Total 10.5833 7.24203 12 (Continued)400 The Process of Research and Statistical Analysis in Psychology [Continued] Tests of Between-Subjects Effects Dependent Variable: Test Score Type Ill Sum Source of Squares df Mean Square F Sig. Corrected Model 556.250" Lal 185.417 71.774 .000 Intercept 1344.083 1344.083 520.290 000 Instruction_Type 80.083 80.083 31.000 .001 Item_Type 374.083 374.083 144.806 .000 Instruction_Type 102.083 102.083 39.516 .000 Item_Type Error 20.667 2.583 Total 1921.000 12 Corrected Total 576.917 11 a. R Squared = .964 (Adjusted R Squared = .951)