A study of 300 teenagers showed that the number of hours they spend on instant messaging sites each week is normally distributed with a mean of 13 hours. The population standard deviation is 5 hours. What is
the margin of error for a 99% confidence interval?

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03-08-2022
Mathematics

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A study of 300 teenagers showed that the number of hours they spend on instant messaging sites each week is normally distributed with a mean of 13 hours. The population standard deviation is 5 hours. What is
the margin of error for a 99% confidence interval?

Sagot :

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