A Single Population Mean Using the Normal Distribution · Exercise 39
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 percent confidence interval for the population mean length of engineering conferences.
(a) State the confidence interval.
(b) Sketch the graph.
(c) Calculate the error bound.
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Statistics · §8.1 A Single Population Mean Using the Normal Distribution · Exercise 39
No hints for this one.
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