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1. (a). Consider a random sample of size n from the Normal(0,1) distribution. For kan define X, EX and X3 X. Find the distrib

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k (i) x 14 N(0,1); i = 1(1)n and X Xi is linear function of Xs so k i=1 n 1 XK No. (1. A). Similarly, řnk= xin N (0 1 ) ) n

The joint distribution of (Z, Y2) is 1 1 fz.ya(z,y2) = exp + y2 ; - <2,42 < 0. 47|y2 4 It is very difficult to marginal distr

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