From the age of the population inquiries in the village, the two groups. Group 1 are as follows: age 20, 19, 52, 34, 27, 20, 23, 33, 40. 2. age groups as follows: 2, 4, 14, 17, 16, 14, 16, 17. Behold the estimated variance is the average of the population age point.
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