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>3. Consider a random sample of 35 teenagers who averaged 7.3 hours of sleep per night. Assume the standard deviation for teenagers is 1.8 hours.

>3. Consider a random sample of 35 teenagers who averaged 7.3 hours of sleep per night. Assume the standard deviation for teenagers is 1.8 hours. Calculate the 98% confidence interval for the mean. X - 7.3 6:7

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