Confidence interval for the average days
A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year with a standard deviation of 23.8 days. What is the 90% confidence interval for the average days worked, u (mu), of all payroll departments?
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A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year with a standard deviation of 23.8 days. What is the 90% confidence interval for the average days worked, u (mu), of all payroll departmen
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Residents of the U.S. have been found to drink an average of 23.2 gallons of bottled water during 2012. If the standard deviation is 2.7 gallons, what is the probability that a randomly selected person drank between 22 and 30 gallons of water each
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