The self-reported number of hours worked per week by 204 top executives is given below.
(a) Estimate the mean, standard deviation, and coefficient of variation, using an Excel work- sheet to organize your calculations.
(b) Do the unequal class sizes hamper your calculations? Why do you suppose that was done?

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Weekly Hours of Work by Top ExecutivesWork From To 40 50 60 80 50 60 80 100 Total 12 116 74 204