Question: Calculate the standard deviation, ÏY, of the random variable Y from Exercise 3.5.9. Exercise 3.5.9 A group of college students were surveyed to learn how

Calculate the standard deviation, ÏƒY, of the random variable Y from Exercise 3.5.9.
Exercise 3.5.9
A group of college students were surveyed to learn how many times they had visited a dentist in the previous year. The probability for Y, the number of visits, is given by the following table:

Calculate the mean, µY, of the number of visits.

Y (No. Visits) 0 Probability 0.15 0.50 0.35 100 Total

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