19. (a) The sum of 50 observation is 500 its sum of squares is 6,000 and median 12. Find the coefficient of variation and cocefficient of skewness. N = 50, EX = 500, EX² = GOO0, Med = 12 3D (b) For a moderately skewed distribution, the arithmetic mean is 100 and coefficient of variation is 35, and person's coefficient of skewness is 0.2 fid the mode and the median.

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