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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
- 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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Seeing Through Statistics
Authors: Jessica M.Utts
4th Edition
1285050886, 978-1305176249, 1305176243, 978-1305322394, 978-1285050881
