Density of the distribution
The density of the distribution of X is f(x) = xe^(-x) for x > 0 and zero otherwise. calculate E(x).
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There are 46 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 5 min and a s
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Without changing the confidence level, indicate specifically what must be changed and by how much. Without changing the margin of error, indicate specifically what must be changed and by how much.
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