The population standard deviation was 1.68 years. using the, Ask an Expert

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A random sample of 81 group leaders and supervisors revealed that they worked an average of 6.55 years before being promoted. The population standard deviation was 1.68 years. Using the 99% degree of confidence, what is the confidence interval for the population mean.

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Category:- Statistics and Probability
Reference No.:- M9400230

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