Question
Based on a random sample of 1120 adults, the mean amount of sleep per night is...
Based on a random sample of 1120 adults, the mean amount of sleep per night is 8.91 hours. Assuming the population standard deviation for amount of sleep per night is 3.2 hours, construct and interpret a 95% confidence interval for the mean amount of sleep per night.
A 95% confidence interval is (___,___)
Homework Answers
Answer #1
A 95% confidence interval is (8.723, 9.097).
We can be 95% confident that true mean amount of sleep per night lies in the interval (8.723, 9.097).
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