# Answer to Question #3074 in Statistics and Probability for zohair

Question #3074

x f

5 5

15 7

25 11

35 16

45 13

55 7

65 4

75 2

mean deviation,variance, standard deviation, coefficent of variance

5 5

15 7

25 11

35 16

45 13

55 7

65 4

75 2

mean deviation,variance, standard deviation, coefficent of variance

Expert's answer

m = mean = sum(1:8; f/65 * x) = 36.077

MD = sum(1;8; f /65 * |x-m] ) = 13.6

s = Std deviation = sqrt( sum(1;8; f/65 * |x-m]

Coefficent of variance = s/ |m| = 0.4767

MD = sum(1;8; f /65 * |x-m] ) = 13.6

s = Std deviation = sqrt( sum(1;8; f/65 * |x-m]

^{2})) = 17.198Coefficent of variance = s/ |m| = 0.4767

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