If the variance of a discrete random variable x is v(x) = 1.6, then v(2x + 3) is

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asked Apr 28, 2019 184k views

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Tranquility · Answer 1 · 2019-05-04T17:23:23+0000

Adding an offset to the data changes the mean, but not the variance. Multiplying the data by a constant changes the variance by the square of that constant.
v(a·x) = a²·v(x)

You will have v(2x+3) = 2²·v(x) = 4·1.6 = 6.4

If the variance of a discrete random variable x is v(x) = 1.6, then v(2x + 3) is

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