QUANTITATIVE ANALYSIS: EVIDENCE FOR RELIABILITY AND VALIDITY
Using the ChapterSixData.sav file, do the following problems. Print your outputs after typing
your interpretation on them. Please circle the key parts of the output that you discuss. Use the
information in the appropriate “Output Interpretation” and “How to Write” sections.
6.1 Compute Cohen’s kappa to assess reliability using Rater 1 and Rater 2. Interpret your
output as in Output 6.1 by writing an explanatory paragraph as you would in the method section
of an article or paper.
6.2 Compute interrater reliability by running a paired t test for the essay score 1 with the essay
score 2. Interpret your output following the guide in the Interpretation of Output 6.2. Write up
your results for this analysis as you would in the method section of an article or paper.
6.3 Run an Exploratory Factor Analysis using the extraction method of principal axis factoring
as demonstrated in Problem 6.3. Run the factor analysis on the 13 items related to stress. In the
extraction window (see Fig. 6.7), request “fixed number of factors to extract” as 2. Study your
output using the Interpretation of Output 6.3, make a table and write up your results as you
would for an article or paper.
6.4 Run Cronbach’s alpha for the five happiness scale items from the Chapter Six data file.
Follow the procedures outlined in Problem 6.4. Write up an explanation of your resulting
Cronbach’s alpha finding as you would in an article or paper.
Make Sure to:
1. Attach your word document for review and grading. Other file formats are not
accepted and will not be graded. Use the following filename format:
2. Include an APA title block with your name, class title, date, and the assignment number.
3. Include a table of contents and a reference section. Number your pages in the footer
along with the date. Include a header starting on page 2 with the Course and
4. Write the problem number and the problem title as a level one heading (Example ‐
A.1.1: Chapter 2, Problem 2.1, and then provide your response.
5. Use level two headings with short titles for multi part questions (Example ‐ A1.1.a,
Short Title, A1.1.b, Short Title II, etc.)
6. Use appropriate level headings for key elements of your discussion such as Research
Questions, Hypotheses, Descriiptive Statistics, Assumptions & Conditions,
Interpretation, Results, and others. Your goal is to make your analysis easy to follow
7. Ensure that all tables and graphs are legible and include a figure number.
8. Carefully review your document prior to submission for formatting, flow, and
readability. Keep in mind that running the statistical tests is only the first half of the
challenge; you must be able to clearly communicate your findings to the reader.