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A Sample of 148 College Students Reports Sleeping an Average

Question 68

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A sample of 148 college students reports sleeping an average of 6.85 hours on weeknights. The sample size is large enough to use the normal distribution, and a bootstrap distribution shows that the standard error is SE = 0.175. Use a normal distribution to construct and interpret a 95% confidence interval for the mean amount of weeknight sleep students get at this university. Use two decimal places in your answer.

Correct Answer:

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z* = 1.96
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6.51 to 7.19 hour...

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