Directions:

The following research questions can be answered using 1 of the 5 tests you have learned so far: single-sample t-test, paired-samples t-test, independent-samples t-test, one-way ANOVA, or two-way ANOVA. Use the information in the tables to construct your SPSS data file, just as you have been doing in Part 2 of each homework assignment. There is only 1 correct choice of analysis for each question, and note that some tests are 1-tailed and some are 2-tailed. The assessment is open-book/open-notes.

For each problem involving a test of significance, your answer must include: A) SPSS output; B) an appropriate graph from SPSS; C) a Results section in current APA style including a statistical statement (i.e., t(19) = 1.79, p = .049); a sentence summarizing the results in English (i.e., There was a significant difference between the two groups on the variable or There was no significant difference); and a decision about the null hypothesis.

For ANOVA problems: Report statistical findings and make statements for all main effects and interaction effects. Use Tukeys test for any analyses requiring post hoc tests. Do not create a boxplot for the 2-way ANOVAuse the graph we typically use in the course for this type of test.

Exercise:

1. Children who experience school-related anxiety are the focus of a psychiatrists study. Specifically, the psychiatrist wants to measure whether a new program helps decrease feelings of anxiety in the short-term. He measures childrens self-reports of school-related anxiety before treatment on a standardized scale with a range of 0-12, with 12 being the most severe. He then administers the new program, and measures childrens self-reported anxiety after treatment. Does the new treatment decrease self-reported levels of school-related anxiety? Choose the correct test to analyze this question, set up the SPSS file, and run the analysis. Follow the directions under the table below. (16 pts)

Patient	Anxiety before tx	Anxiety after tx
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16	10 6 8 4 5 12 9 9 6 8 2 5 11 11 7 9	8 6 5 3 3 9 6 8 7 7 3 4 6 10 5 6

a) SPSS output

b) SPSS graph

c) Current APA-style Results section