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Given the following grouped data, estimate the sample variance and standard deviation accurate to 1...

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Accounting

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Given the following grouped data, estimate the sample variance and standard deviation accurate to 1 place after the decimal. Keep all decimals until the final answer then round appropriately. age (class) frequency 15-20 co 20-25 25-30 30-35 35-40 40-45 8 13 19 30 22 12 The estimated variance and standard deviation (1 decimal place) is a variance of and a standard deviation of years

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