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The data represent the number of miles that 20 runners ran during one week. Find the sample mean, range, variance, and standard deviation. Class Frequency

The data represent the number of miles that 20 runners ran during one week. Find the sample mean, range, variance, and standard deviation. Class Frequency 6-10 11-15 16-20 21-25 26-30 31-35 36-40 1 2 3 5 4 3 2

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