Let X1, . . . , Xn be a sample from cdf F and denote the order statistics by X(1), X(2), . . ., X(n). We will assume that F is continuous, with density function f . From Theorem A in Section 3.7, the density function of X(k) is
a. Find the mean and variance of X(k) from a uniform distribution on [0, 1]. You will need to use the fact that the density of X(k) integrates to 1. Show that
b. Find the approximate mean and variance of Y(k), the kth-order statistic of a sample of size n from F. To do this, let
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