Question: Calculate the sample variance and sample standard deviation for the following frequency distribution of heights in centimeters for a sample of 8-year-old boys. If necessary,

Calculate the sample variance and sample standard deviation for the following frequency distribution of heights in centimeters for a sample of 8-year-old boys. If necessary, round to one more decimal place than the largest number of decimal places given in the data.

Heights in Centimeters ClassFrequency

120.6-123.6 23

123.7-126.7 31

126.8-129.8 45

129.9-132.9 31

133.0-136.0 28

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