Mathematics, 07.07.2020 14:01, annapittbull12

A random sample of 85 group leaders, supervisors, and similar personnel revealed that a person spent an average 6.5 years on the job before being promoted. The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for the population mean?

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A random sample of 85 group leaders, supervisors, and similar personnel revealed that a person spent...