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Suppose that the amount of time teenagers spend on the Internet is normally distributed with a population standard deviation of 1.5 hours. A sample of

Suppose that the amount of time teenagers spend on the Internet is normally distributed with a population standard deviation of 1.5 hours. A sample of 100 teenagers is selected at random, and the sample mean computed. Determine the range of the 95 percent confidence interval (that is, two times the margin of error).

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