Page 153, 2.8.8*. Let X and Y be independent random variables with means μ₁, μ2, and variances ²1, ²2. Determine the correlation coefficient of X and Z = X + Y in terms of M₁, M₂, 0²1, 0² 2. 2,

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A: Solution: Given information: Husband has 8 friends  Wife has 9 friends  Total friends = 8+9= 17

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Q: Find two  z  values so that  78%  of the middle area is bounded by them.

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