7868 t-Test Application and Interpretation

nstructions

For this assignment:

• Use the Data Analysis and Application template ().
• For help with the statistical software, refer to the document.
• View
• for a brief tutorial video on this assignment.
• View
• for a longer video on how to interpret the statistical software output.
• Refer to the for information on analyses and interpretation.
• For information on the data set, refer to the document.

The file is a sample data set. The data represent a teacher’s recording of student demographics and performance on quizzes and a final exam across three sections of the course. This data file is used in all four papers (Week 2, Week 4, Week 6, and Week 8).

This weeks assignment is on t tests. You will analyze the following variables in the statistical software data set:

VariableDefinitionReviewAttended review sessions?: 1 = no; 2 = yesFinalFinal exam: Number of correct answers

Step 1: Write Section 1 of the DAA: The Data Analysis Plan

• Name the variables used in this analysis and whether they are categorical or continuous.
• State a research question, null hypothesis, and alternate hypothesis for the independent samples t-test.

Step 2: Write Section 2 of the DAA: Testing Assumptions

Test for one of the assumptions of t tests equality (homogeneity) of variances.

• Create statistical output showing the Levene’s Test for Equality Variances.
• Paste the table in the DAA template.
• Interpret the Levene’s test.

Step 3: Write Section 3 of the DAA: Results and Interpretation

• If the homogeneity assumption is not violated (Section 2), run the Student version of the independent samples t test in the statistical software.
• If the homogeneity assumption is violated, run the Welch version of the independent samples t-test in the statistical software.
• Also, run the Descriptives option to obtain the means and standard deviations for each group.

Paste the statistical software output of the t test into the DAA template. Below the output:

• Report the means and standard deviations for each group.
• State the results of the t test.
• Interpret the statistical results against the null hypothesis and state whether it is rejected or not rejected.

Step 4: Write Section 4 of the DAA: Statistical Conclusions

• Provide a brief summary of your analysis and the conclusions drawn about this t test.
• Analyze the limitations of the statistical test and/or possible alternative explanations for your results.

Step 5: Write Section 5 of the DAA: Application

Analyze how you might use the independent samples t test in your field of study.

• Name an independent variable and dependent variable that would work for such an analysis and why studying it may be important to the field or practice.

Submit your DAA template as an attached Word document in the assignment area.

Competencies Measured

By successfully completing this assignment, you will demonstrate your proficiency in the following course competencies and assignment criteria:

• Competency 1: Analyze the computation, application, strengths, and limitations of various statistical tests.
• Analyze statistical assumptions.
• Competency 2: Analyze the decision-making process of data analysis.
• Articulate the data analysis plan.
• Competency 3: Apply knowledge of hypothesis testing.
• Interpret statistical results and hypotheses.
• Competency 4: Interpret the results of statistical analyses.
• Explain statistical conclusions, the limitations of the test, and possible alternative explanations.
• Competency 6: Apply the results of statistical analyses (your own or others) to your field of interest or career.
• Analyze the potential applications of the test in the field and their implications.
• Competency 7: Communicate in a manner that is scholarly, professional, and consistent with the expectations for members in the identified field of study.
• Communicate in a manner that is scholarly, professional, and adheres to APA style and formatting.