Five teenagers are selected at random. Let X be the number of them who have sent text

Question:

Five teenagers are selected at random. Let X be the number of them who have sent text messages on their cell phones within the past 30 days. According to a study by the Nielsen Company, the probability distribution of X is as follows:

a. Find P(2).

b. Find P(More than 1).

c. Find the probability that three or more of the teenagers sent text messages.

d. Find the probability that fewer than two of the teenagers sent text messages.

e. Compute the mean μX.

f. Compute the standard deviation σX.

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

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Question Posted: May 06, 2024 02:10 AM

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Five teenagers are selected at random. Let X be the number of them who have sent text

Question:

x 0 2 3 4 5 P(x) 0.015 0.097 0.258 0.343 0.227 0.060

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Elementary Statistics

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