6.52 Grandparents Let X = the number of living grandparents that a randomly selected adult American has.

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6.52 Grandparents Let X = the number of living grandparents that a randomly selected adult American has. According to recent General Social Surveys, its probability distribution is approximately P102 = 0.71, P112 = 0.15, P122 = 0.09, P132 = 0.03, P142 = 0.02.

a. Does this refer to a discrete or a continuous random variable? Why?

b. Show that the probabilities satisfy the two conditions for a probability distribution.

c. Find the mean of this probability distribution.

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Statistics The Art And Science Of Learning From Data

ISBN: 9781292164878

4th Global Edition

Authors: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg

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