Treat the results of the Sullivan Statistics Survey as a random sample of adult Americans. The individuals were asked to disclose their political philosophy (conservative, moderate, liberal) as well as the income level they consider to be rich. Load the results of the survey into a statistical spreadsheet.

(a) If we want to know if there is a difference in the mean income level considered to be rich among the three groups, state the null and alternative hypotheses.

(b) Verify that the requirements to use the one-way ANOVA procedure are satisfied. Normal probability plots indicate the sample data come from normal populations.

(c) Are the mean income levels considered to be rich for the three political philosophies different at the a = 0.5 level of significance?

(d) Draw boxplots of the income levels of the three political philosophies to support the analytic results obtained in part (c).