Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 46
Announcements for 84 upcoming engineering conferences were randomly picked from a stack of IEEE Spectrum magazines. The mean length of the conferences was 3.94 days, with a standard deviation of 1.28 days. Assume the underlying population is normal.
(a) In words, define the random variables X and .
(b) Which distribution should you use for this problem? Explain your choice.
(c) Construct a 95% confidence interval for the population mean length of engineering conferences.
(a) State the confidence interval.
(b) Sketch the graph.
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Introductory Business Statistics 2e · §8.4 Calculating the Sample Size n: Continuous and Binary Random Variables · Exercise 46
No hints for this one.
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