Question: The average mean amount of time that a manager at
The average (mean) amount of time that a manager at the Cimaron Valley Department of Human Services spends in the annual performance review with an employee is 31.3 minutes, with a standard deviation of 5.7 minutes (normal distribution). What percentage of the annual performance reviews in the department take between 24.9 and 36.1 minutes? Between 26.4 and 30.6 minutes? Between 32.0 and 37.5 minutes? What percentage of the annual performance reviews take more than 40 minutes? What percentage takes less than 20 minutes?
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