Calculate the 90% confidence interval for the following variables, comparing lower, working, middle, and upper classes (CLASS) in the GSS sample. First, tell SPSS that we want to select all cases in the sample by selecting Data, Select Cases, and then All Cases, and then OK. Then, use the Explore procedure using CLASS as your factor variable (Analyze, Descriptive Statistics, Explore). Make a summary statement of your findings.
a. CHILDS (Number of children in the household)
b. EDUC (Respondents highest year of school completed)
c. PAEDUC (Fathers highest year of school completed)
d. PRESTG80 (Respondents occupational prestige)
e. MAEDUC (Mothers highest year of school completed)