The table shows Minitab descriptive statistics for the years of education for the fathers and mothers of

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The table shows Minitab descriptive statistics for the years of education for the fathers and mothers of students in one of the author€™s statistics classes and in one of her pre-algebra classes. Twelve years is equivalent to a high school education.

a. Are the means higher for those in pre-algebra or those in statistics?
b. In pre-algebra, is the mean higher for the mothers or the fathers?
c. Which of the four groups has the smallest standard deviation (StDev)?

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