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Announcements for 84 upcoming engineering conferences were randomly picked from a stack of IEEE Spectrum magazines....

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Question

Basic Math

Announcements for 84 upcoming engineering conferences wererandomly picked from a stack of IEEE Spectrum magazines. The meanlength of the conferences was 3.94 days, with a standard deviationof 1.28 days. Assume the underlying population is normal.

PART A:

Construct a 95% confidence interval for the population meanlength of engineering conferences.

What is the lower bound of the confidence interval? (Round to 2decimal places)

PART B:

Construct a 95% confidence interval for the population meanlength of engineering conferences.

What is the upper bound of the confidence interval? (Round to 2decimal places)

Answer & Explanation Solved by verified expert
4.4 Ratings (711 Votes)
Solution Given thatPoint estimate sample mean 394Population    See Answer
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