In this assessment, you’ll begin to explore mean group differences in your courseroom data. Is it possible that being in a particular group results in higher or lower mean achievement levels? You’re going to explore gender differences and overall learner GPA.
Assessment T-TEST APPLICATION AND INTERPRETATION
Complete the following for this assessment:
For this assessment, you will use the Data Analysis and Application Template (DAA Template [DOC]).
For help with SPSS, refer to IBM SPSS Step-By-Step Guide: t Tests [DOCX].
For help copying SPSS output into your DAA, review the Copy/Export Output Instructions [HTML].
For information on the data set, you may find the Data Set Instructions [DOC] helpful.
Refer to the 7864 Course Study Guide for information on analyses and interpretation.
This assessment is on t-tests. You will analyze the following variables in the grades.sav data set:
SPSS Variable Definition
Gender female =1; male =2
GPA previous grade point average
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 an alternate hypothesis for the independent samples t-test.
Step 2: Write Section 2 of the DAA: Testing Assumptions
Create SPSS output showing the Levene’s Test for Equality Variances. Run the Levene’s test on the dependent variable test for the entire sample. Do not split the data up by gender before running the homogeneity test.
Paste the table in the DAA.
Interpret the Levene’s test.
Step 3: Write Section 3 of the DAA: Results and Interpretation
Paste the SPSS output of the t test. Below the output:
Report the means and standard deviations for each group.
State the results of the t-test using the “Assume equal variances” row.
Interpret the statistical results against the null hypothesis and state whether it is accepted or 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 assessment area.
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