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Calculate the (i) coefficient of quartile deviation and (i) standard deviation from the following table which illustrates the age distribution of 200 life insurance

Calculate the (i) coefficient of quartile deviation and (i) standard deviation from the following table which illustrates the age distribution of 200 life insurance policy holders. Age distribution Number of persons Less than 30 Less than 40 Less than 50 Less than 60 Less than 70 25 81 130 170 200

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