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 Tukey's test for any analyses requiring post hoc tests. Do not create a boxplot for the 2-way ANOVA-use the graph we typically use in the course for this type of test.
1. An investigator in child development research is studying whether parenting styles have an effect on second grade students' behavior at school. She interviews 23 volunteer families from the same class and separates them into three groups of parenting styles: authoritarian (n = 8); authoritative (n = 8); and permissive (n = 7). Their teacher fills out a behavior inventory for each of the 23 children, and the investigator collects and scores them. The scores are contained in the table below. The scores can range from 0-20, and a higher score indicates more behavior problems. Is there a significant difference between the groups? Choose the correct test to analyze this question, set up the SPSS file, and run the analysis. Follow the directions under the table below.
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Authoritarian
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8, 13, 4, 15, 5, 4, 9, 12
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Authoritative
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8, 5, 6, 4, 2, 5, 10, 13
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Permissive
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10, 8, 16, 9, 8, 3, 15
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a) SPSS output
b) SPSS graph
c) Current APA-style Results section