Each of the following is a table of means showing the results of a study using a factorial design. Assuming that any differences are statistically significant, for each table.
(a) and (b) Make two bar graphs showing the results (in one graph grouping the bars according to one variable and in the other graph grouping the bars according to the other variable).
(c) Indicate which effects (main and interaction), if any, are found.
(d) Describe the meaning of the pattern of means (that is, any main or interaction effects or the lack thereof) in words.
(i) Measured variable: Income (thousands of dollars)

(ii) Measured variable: Grade point average

(iii) Measured variable: Days sick per month

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