In late 2007 it was reported that 79 of us adults owned a, Ask an Expert

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In late 2007, it was reported that 79% of U.S. adults owned a cell phone (data extracted from E.C. Baig, "Tips Help Navigate Tech-Buying Maze", USA Today, November 28, 200, p.5B). Suppose that by the end of 2009, that percentage was 85%. If a sample of 10 U.S. adults is selected, what is the probability that:

a). P(X = 8)

b). P(X ? 8)

c.) P(X ? 10)

d.) Provide a substantive answer to the question.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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