Instructions: Lesson 27 Exercise File 2 is located at the end of the chapter under the heading Exercises in your Green and Salkind textbook. Complete the exercise and then complete the worksheet below by filling in the blanks and answering the questions.
H01: There is no significant difference among the depression scores of students who receive Journal and Counseling therapy, Journal therapy only, or Counseling therapy only, while controlling for pre-test depression scores.
Assumptions
Outliers: Create a Box and Whisker plot for each group.
Insert Grapsh or Table Here
Fill in the blanks:
Group (Pre-Test): Outliers (Item #) Are there any outliers?
Journal and Counseling Journal only Counseling only
Group (Post-Test): Outliers (Item #) Are there any outliers?
Journal and Counseling Journal only Counseling only
< Note: Remove any outliers from the dataset before continuing.>
Assumption of Normality: Run a normality test for each group. Insert Tests of Normality table below:
Insert Graph or Table Here
Fill in the blanks:
Should you use a Shapiro-Wilks or Kolmogorov-Smirnov test? Why?
Answer:
Groups (Pre-Test) Significance Is the assumption of normality met?
Journal and Counseling Journal only Counseling only
Groups (Post-Test) Significance Is the assumption of normality met?
Journal and Counseling Journal only Counseling only
Assumption of Linearity: Hint: Run a series of scatter plots between the pre-test variable and post-test variable for each group. Begin by going to Data > Split File (see lesson 15, p. 64), and then make the plots. Add line of fit. See Warner p. 168- 172. After making
