A random sample of 85 supervisors revealed that they worked an average of 7.3 years before being promoted. The population standard deviation was 2.5 years. Using the 0.95 level of confidence, what is the margin of error of the confidence interval for the population mean?
A random sample of 85 supervisors revealed that they worked an average of 7.3 years before being promoted. The population standard deviation was 2.5 years. Using the 0.95 level of confidence, what is the margin of error of the confidence interval for the population mean?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 7PPS
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