7. Let X1, X2, ..., Xn be a random sample from a population with density Function f(x; 0) = {" e-(x- if 0 < x < ∞ otherwise, 0 Probability and Mathematical Statistics 529 where ER is an unknown parameter. Then show that Q = X(1) - 0 is a pivotal quantity. Using this pivotal quantity find a 100(1 - a)% confidence nterval for 0.

Q: None

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