Assignment: Chi Square
Previously in this course, you worked with
parametric statistics
like t-tests, ANOVAs, and correlations. In order to use parametric procedures such as those, the dependent
variable
must be measured on either an interval or a ratio scale. Sometime, however, the variables of interest are categorical; that is, they are not measured on an interval or a ratio scale. For example, the categorical variables of gender, race, or political affiliation are not measured with interval or ratio scales. For this Assignment, you will examine the nonparametric procedure called chi square, which allows you to analyze categorical data.
To prepare for this Assignment, imagine that you have information about how 20 nursing students and 20 psychology students felt about starting PSYC 3002 on Day 1 of this class. You want to know if nursing students and psychology students felt differently about embarking on the Introduction to Basic Statistics journey. You can find the data set for this Assignment in the Weekly Data Set forum found in the Discussions area of the course navigation menu.
By Day 7
To complete this Assignment, submit
your answers to the following. Use SPSS to determine if academic program is related to feelings about PSYC 3002 by computing the appropriate
chi square test.
- Recall the four scales of measurement you learned about in Week 1 (i.e., nominal, ordinal, interval, ratio). Explain what scale of measurement is used to measure academic program in this example. How do you know?
- Explain what scale of measurement is used to measure feeling about PSYC 3002. Explain how you know.
- State whether this scenario requires a goodness of fit test or a test of independence. Explain your answer.
- Before computing the chi square, state the null
hypothesis
and
alternative hypothesis
in words (not formulas).
- Identify the obtained χ2 using SPSS and report it in your answer document.
- State the degrees of freedom and explain how you calculated it by hand.
- Identify the
p value
using SPSS and report it in your answer document.
- Explain whether you should retain or reject the
null hypothesis
and why.
- Are the results
statistically significant? How do you know?
- Explain what you can determine about the
relationship
between academic program and feelings about PSYC 3002.
Be sure to fully explain the rationale for your answer to each question, including evidence from the text and Learning Resources.
Provide an APA reference list.
Submit three documents for grading:
- Your text (Word) document with your answers and explanations to the assignment questions, your
SPSS Data file, and your
SPSS Output file, your SPSS Data file , and your SPSS Output file.
Submission and Grading Information
To submit your completed Assignment for review and grading, do the following:
- Click the
Week 6 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 first document you want to attach (your Word doc, SPSS Data file, or SPSS Output file) and click
Open. Repeat this for the remaining two documents.
- 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.
Grading Criteria
To access your rubric:
Week 6 Assignment Rubric
Check Your Assignment Draft for Authenticity
To check your Assignment draft for authenticity:
Submit your Week 6 Assignment draft and review the originality report.
Submit Your Assignment by Day 7
To submit your Assignment:
Week 6 Assignment
Quiz: Week 6 Test
Practice Test
Take the 5-question Practice Test to test your knowledge of this week’s content and to receive feedback on your responses. You must complete the Practice Test before taking this week’s Test for Understanding. The Practice Test can be taken as many times as you need in order to master the content. Once you complete the Practice Test with a score of 100% (5 out of 5 points), a link to the Test for Understanding will appear. Click on the Practice Test link to access the Practice Test. Once you complete the Practice Test, click “OK” to view your results. Be sure to read the feedback for each question.
Test for Understanding
This 20-question Test for Understanding assesses how well you understand and can apply the information in this week’s Learning Resources.
To prepare for the Test for Understanding:
- Review the assigned Learning Resources.
- Take the Practice Test until you have answered all 5 questions correctly.
About the Test for Understanding:
- The Test for Understanding has a 40-minute time limit and must be completed in one sitting.
- For each minute taken in excess of 40 minutes, students will have a 1-point deduction from the test grade.
- If you encounter technical difficulties during the Test for Understanding, or if you have questions about how an online test works, contact Student Support for more information.
Once you have completed the Test for Understanding, you will be shown the correct answer for each question.
Click on the Test link to access the Test for Understanding. Please note, you will not see this link until you have completed and scored 5/5 on the Practice Test.
Please answer each question and click
Submit
when you have completed the Test. If you are inactive for a period of time during the test, you may be prompted to exit the test. Remember to carefully read the prompts provided by the test. For example, click "Cancel" (as in cancel the exit) to stay
inside
the test. If you click "OK" or "back," you accept to
exit
the test. Please be mindful about staying active inside the test (i.e., how much time you spend between items) so the test does not time you out.
Submission and Grading Information
Submit Your Quiz by Day 7
To submit your Quiz:
Week 6 Quiz