A random sample of 85 students finds that they, on average, they get 6.5 hours of...
- A random sample of 85 students finds that they, on average,
they get 6.5 hours of sleep a night, with a sample standard
deviation of 7 hours.
- Would you use the z-distribution or the t-distribution to construct a confidence interval? How do you know?
- Construct a 95% confidence interval for the population mean. How do you interpret this interval?
- Is it likely that students actually get 7 hours of sleep a night? How can you tell?
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A random sample of 85 students finds that they, on average,
they get 6.5 hours of...
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A random sample of community college students was asked the number of hours they sleep on a typical week-night during a given academic term. The sample data are as follows: 8 6 4 5 3 7 S 4 3 4 4 5 6 8 7 7 7 3 3 4 What is the 90% confidence interval estimate for the true mean amount of sleep time per night spent by community college students during a academic term? a) The data give...
Based on a random sample of 1180 adults, the mean amount of sleep per night is 7.85 hours. Assuming the population standard deviation for amount of sleep per night is 1.4 hours, construct and interpret a 95% confidence interval for the mean amount of sleep per night. A 95% confidence interval is (DD Round to two decimal places as needed.) Interpret the confidence interval O A. O B. ° C. 0 D. We are 95% confident that the interval actually...
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