A high-tech company wants to estimate the mean number of years of college education its employees have completed. A good estimate of the population standard deviation for the number of years of...



  1. A high-tech company wants to estimate the mean number of years of college education its employees have completed. A good estimate of the population standard deviation for the number of years of college is 1.0 years.  How large a sample needs to be taken to estimate the mean to within 0.2 year, with 99% confidence?




Jun 08, 2022
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