Suppose the heights of 100 male students at XYZ University represent a random sample of the heights of all 1546 male students at the university. Determine unbiased and efficient estimates of the true mean and the true variance. Height (inches) 60-62 63-65 66-68 69-71 72-74 Total No. of Students 5 18 42 27 8 100 Heights of 100 male students at XYZ university

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