A Pew Research report indicated that 73 of teenagers aged 1317 own smartphones A random sample of 150 teenagers is drawn a Find the mean p b Find the standard deviation p c Find the probability that more than 70 of the sampled teenagers own a smartphone d Find the probability that the proportion of...

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A Pew Research report indicated that 73% of teenagers aged 1317 own smartphones. A random sample of

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A Pew Research report indicated that 73% of teenagers aged 13–17 own smartphones. A random sample of 150 teenagers is drawn.

a. Find the mean μp̂.

b. Find the standard deviation σp̂.

c. Find the probability that more than 70% of the sampled teenagers own a smartphone.

d. Find the probability that the proportion of the sampled teenagers who own a smartphone is between 0.76 and 0.80.

e. Find the probability that less than 75% of the sampled teenagers own smartphones.

f. Would it be unusual if less than 68% of the sampled teenagers owned smartphones?

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

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Question Posted: May 06, 2024 12:00 PM

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A Pew Research report indicated that 73% of teenagers aged 1317 own smartphones. A random sample of

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Elementary Statistics

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