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)
