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Note: You must complete the discussion, “Using ANOVA to Compare Groups,” before submitting this assignment.

#### Assignment Preparation

Before completing this assignment:

• Complete the related CogBooks activities.
• Read the pdf, “ANOVA,” located in the assignment Resources section.
• Read the Word document, “ANOVA Assignment Resources,” located in the assignment Resources section.
• Refer to the IBM SPSS and DAA Step-by-Step guides for help in completing the assignment.

#### Assignment Instructions

Use the DAA Template to complete this assignment. Links to additional resources are available in the Resources area.

Reminder: The format of this SPSS assignment should be narrative with supporting statistical output (table and graphs) integrated into the narrative in the appropriate place (not all at the end of the document).

You will analyze the following variables in the grades.sav data set:

• sectionquiz3.

#### Step 1: Write Section 1 of the DAA

• Provide a context of the grades.sav data set.
• Include a definition of the specified variables (predictor, outcome) and corresponding scales of measurement.
• Specify the sample size of the data set.

#### Step 2: Write Section 2 of the DAA

• Analyze the assumptions of the one-way ANOVA.
• Paste the SPSS histogram output for quiz3 and discuss your visual interpretations.
• Paste SPSS descriptives output showing skewness and kurtosis values for quiz3 and interpret them.
• Paste SPSS output for the Shapiro-Wilk test of quiz3 and interpret it.
• Report the results of the Levene test and interpret it.
• Summarize whether or not the assumptions of the one-way ANOVA are met.

#### Step 3: Write Section 3 of the DAA

• Specify a research question related to the one-way ANOVA.
• Articulate the null hypothesis and alternative hypothesis.
• Specify the alpha level.

#### Step 4: Write Section 4 of the DAA

• Begin by pasting the SPSS output of the means plot and providing an interpretation.
• Also report the means and standard deviations of quiz3 for each level of section.
• Next, paste the SPSS ANOVA output and report the results of the F test, including:
• Degrees of freedom.
• F value.
• p value.
• Calculated effect size.
• Interpretation of the effect size.
• Finally, if the omnibus F is significant, provide the SPSS post-hoc (Tukey HSD) output.
• Interpret the post-hoc tests.

#### Step 5: Write Section 5 of the DAA

• Discuss the conclusions of the one-way ANOVA as it relates to the research question.
• Conclude with an analysis of the strengths and limitations of one-way ANOVA.