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Assignment: SPSS – Independent-Samples tTest
The independent-samples t-test is one of several inferential statistical tests in the t-test family.
The purpose of the independent-samples t-test is to examine whether there is a statistically
significant group mean (average) difference on a scale (numerical) business outcome variable.
For example, a researcher might be interested in knowing whether night shift workers produce
more widgets, on average, than day shift workers. The independent-samples t-test is used when
the researcher has one nominal (categorical) independent variable, with two levels, day shift and
night shift, and one scale (numerical) dependent variable (e.g., monthly number of widgets
produced).
To prepare for this Assignment, review the Paul and Garg (2014) article, focusing on the
independent-samples t-test. Also, review the Week 3 Assignment Exemplar and Week 3
Assignment Template documents, as well as the tutorial videos, provided in this week’s
Resources. Be sure to review the footnotes in the Week 3 Assignment Exemplar, as the footnotes
provide additional explanatory information. Consider how independent-samples t-tests can
impact the progress or results of a doctoral research study.
By Day 7
Submit a synthesis of statistical findings derived from independent-samples t-tests that follows
the Week 3 Assignment Template. Your synthesis must include the following:
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A description and justification for using the independent-samples t-test
A properly formatted research question
A properly formatted H0(null) and H1 (alternate) hypothesis
An APA-formatted Results section for the independent-samples t-test, to include the
following:
o Identification of the statistical test
o Identification of independent and dependent variables, including identification of
the number of levels for the independent variable
o Identification of data assumptions and assessment outcome
o Inferential results in correct APA statistical notation format
o A properly formatted box plot
o APA-formatted references
An Appendix including the SPSS output (Group Statistics and Independent Samples Test
parameters; see Week 3 Assignment Exemplar)
Note: You will cut and paste the appropriate SPSS output into the Appendix. The SPSS output is
not in APA format, so you will need to type the information from the SPSS output to the
appropriate sections of the APA table. You must use the Week 3 Assignment Template to
complete this Assignment. Also, refer to the Week 3 Assignment Rubric for specific grading
elements and criteria. Your Instructor will use this rubric to assess your work.
Submission and Grading Information
To submit your completed Assignment for review and grading, do the following:
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Please save your Assignment using the naming convention “WK3Assgn+last name+first
initial.(extension)” as the name.
Click the Week 3 Assignment Rubric to review the Grading Criteria for the
Assignment.
Click the Week 3 Assignment link. You will also be able to “View Rubric” for grading
criteria from this area.
Next, from the Attach File area, click on the Browse My Computer button. Find the
document you saved as “WK3Assgn+last name+first initial.(extension)” and click Open.
If applicable: From the Plagiarism Tools area, click the checkbox for I agree to submit
my paper(s) to the Global Reference Database.
Click on the Submit button to complete your submission.

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