Do the following analysis using the hypothetical data provided in the Table 13.4 on page 545 of the Warner text (as always, you need to create an SPSS data file and name it u03a1.sav ). In this imaginary experiment, participants were randomly assigned to receive either no caffeine (1) or 150 mg of caffeine (2); and to a no exercise condition (1) or half an hour of exercise on a treadmill (2). The dependent variable was heart rate in beats per minute.

1. Graph the distribution of HR scores (as a histogram). Is this distribution reasonably normal? Are there any outliers?
2. Run a factorial ANOVA using the SPSS GLM procedure. Verify that the values of the SS terms in the SPSS GLM printout agree with the SS values you obtained from your spreadsheet. Make sure that you request cell means, a test of homogeneity of variance, and a plot of cell means (as in the example in Chapter 13).
3. What null hypothesis is tested by the Levene statistic? What does this test tell you about possible violations of an assumption for ANOVA?
4. Write up a results section. What conclusions would you reach about possible effects of caffeine and exercise on heart rate? Is there any indication of an interaction?

Price: $11.9

Solution: The downloadable solution consists of 8 pages, 390 words and 4 charts.
Deliverable: Word Document