CHI-SQUARE ANALYSIS

CHI-SQUARE ANALYSIS

Overview

In this assignment, you will learn how to conduct and interpret a chi-square analysis. You will use the IBM SPSS Crosstabs procedure with the .sav file provided. The two variables to be analyzed will be pass/fail and lowup (lower class versus upper class students). 

Instructions

Complete the following:

· Step 1. Provide a context for the data set in the supplied .sav file. Include a definition of the specified variables, levels of each factor, and the outcome variable. Define the corresponding scales of measurement for each variable. Specify the sample size of the data set.

· Step 2. Specify a research question for this chi-square. Articulate a null hypothesis and alternative hypothesis for the chi-square. Specify the alpha level.

· Step 3. 

. Paste the SPSS output showing expected frequencies (E). Report E for each cell in the 2 x 2 table.

. Determine if the expected frequencies assumption is met.

. If the assumption is met, indicate which version of chi-square should be reported.

. If the assumption is not met, indicate which version of chi-square should be reported.

· Step 4. 

. Begin by stating your conclusion regarding the expected frequencies assumption.

. Next, create a table of observed frequencies for the two variables low up and pass/fail.

. Report the observed number of passengers in lower class and the upper class who were passed and failed.

. Next, paste the SPSS output for Symmetric Measures.

. Report the phi coefficient and interpret the effect size.

. Then paste the SPSS output for chi-square Tests.

. Report the version of chi-square that is appropriate given the E assumption. Include the symbol for chi-square, the degree of freedom, the chi-square value, the p-value, and your decision regarding the null hypothesis.

. Next, calculate and report the odds of passing for the upper class group and odds of passing for the lower class group.

. Finally, calculate the odds ratio of passing comparing the upper class group to the lower class group.

· Step 5. Discuss your conclusions of the chi-square as it relates to your stated research question. Conclude with an analysis of the strengths and limitations of chi-square analysis.