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The following is a frequency distribution for the ages of a sample of employees at a local company Age Frequency 30 39 40 49 50 59 60 69 70 79 7 4 8 5 1 a Determine the average age for the sample b Compute the variance Round your answer to two decimal places 7 5 x c Compute the standard deviation Round your answer to two decimal places d Compute the coefficient
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