Find the mean and variance of the sum
Let X1, X2, X3, and X4 be four mutually stochastically independent random variables with the same pdf f(x) = 2x, 0
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A researcher is interested in investigating if phosphate supplementation results in significant increase in growth rate of dogs. Answers must be correct up to three decimal places.
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Let X1, X2, X3, and X4 be four mutually stochastically independent random variables with the same pdf f(x) = 2x, 0<x<1, zero elsewhere.. Find the mean and variance of the sum Y of these four random variables.
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A correlation is computed for a sample of n = 18 pairs of X and Y values. What correlations are statistically significant with ? = .05, two tails. 1. correlations greater than or equal to 0.456 and correlation less than or equal to -0.456 2.
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