Suppose X has density f(x) = c/(x^4) for x > 1, and f(x) = 0 otherwise, where c is a constant. Find a) c; b) E(X); c) Var(X).
I'm so confused...I dont even know where to start...
Thanks in advance!
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So the integral of f(x) over all x equals 1 (since its a probability density function) so so you need to integrate, then solve for c.
So you can use a similiar process to find
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