What is the 90 confidence interval for the amount of time
From a random sample of 41 teens, it is found that on average they spend 31.8 hours each week online with a standard deviation of 3.65 hours. What is the 90% confidence interval for the amount of time they spend online each week?
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from a random sample of 41 teens it is found that on average they spend 318 hours each week online with a standard
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recent predictions for population growth in the 21st century are quite different from predictions made several decades
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