Mathematics, 12.03.2020 06:28 Marcus2935
Define a random variable Y to be Y = X1 + X2 + · · · + Xn n , where n is a fixed positive constant number. Suppose all of the X’s follow the same normal distribution, each with the same mean µ and the same variance σ 2 , so X1 ∼ N(µ, σ2 ); X2 ∼ N(µ, σ2 ); . . . ; Xn ∼ N(µ, σ2 ). Suppose that all of the X’s are independent. (a) Find E(Y ) = E X1 + X2 + · · · + Xn n . (b) Find V(Y ) = V X1 + X2 + · · · + Xn n
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Mathematics, 22.06.2019 01:00, catycait27p5rc5p
5. write an equation for the line that is parallel to the given line and that passes through the given point. y = –5x + 3; (–6, 3)
Answers: 2
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