1.

What is the variance of 4, 8, 10, 12, 16, 34 ?

Answer»

Variance (σ2) is the average of squared difference from mean.

Mean is M = (4 + 8 + 10 + 12 + 16 + 34)/6 = 84/6 = 14

Variance is (σ2) = {(4-14)2 + (8-14)2 + (10-14)2 + (12-14)2 + (16-14)2 + (34-14)2}/6

= (100 + 36 + 16 + 4 + 4 + 400)/6

= 560/6

= 93.33



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