Question: Approximate the sample variance and standard deviation given the following frequency distribution: Class Frequency 0-9 13 10-19 7 20-29 10 30-39 9 40-49 11

Approximate the sample variance and standard deviation given the following frequency distribution: Class Frequency 0-9 13 10-19 7 20-29 10 30-39 9 40-49 11

Class Frequency 0-9 13 10-19 7 20-29 10 30-39 9 40-49 11

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