Question: Let Y1, ..., Y4 be random variables with means and variances as shown here: Y1 Y2 Y3 YA mean 0 1 4 1 variance 1

Let Y1, ..., Y4 be random variables with means and variances

Let Y1, ..., Y4 be random variables with means and variances as shown here: Y1 Y2 Y3 YA mean 0 1 4 1 variance 1 41 4 Let W1 = Y1 + Y2 + Y3 + Y4 and W2 = (Y1 + Y2) - (Y3 + Y4)

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