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A random sample of 85 group leaders and supervisors revealed that a person spends a mean of 6.5 years on the job before being promoted.The

A random sample of 85 group leaders and supervisors revealed that a person spends a mean of 6.5 years on the job before being promoted.Thepopulationstandard deviationof the normal distribution is 1.7 years.Using the 95% degree of confidence, what are the limits of the confidence interval for the population mean?

A.6.06 and 6.94

B.6.10 and 6.90

C.6.14 and 6.86

D.6.20 and 6.80

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