A sample of 40 songs from a students iTunes playlist showed a mean length of 3.542 minutes
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A sample of 40 songs from a student’s iTunes playlist showed a mean length of 3.542 minutes with a standard deviation of 0.311 minute.
(a) Construct a 95 percent confidence interval for the mean.
(b) Why might the normality assumption be an issue here?
(c) What sample size would be needed to estimate μ with 95 percent confidence and an error of ±6 seconds?
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Related Book For
Essential Statistics In Business And Economics
ISBN: 9781260239508
3rd Edition
Authors: David Doane, Lori Seward
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