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Let u be a fixed number in JR., and define the convex function rp(x) = eux for all x E R Let X be a
Let u be a fixed number in JR., and define the convex function
rp(x) = eux for all x E R Let X be a normal2random variable with mean
= lEX and standard deviation a = [IE(X - p,) ] i.e., with density
p,1
("-'2) f(x)= 1 e 2.. 2
(ii) Verify that Jensen's inequality holds (as it must): !Erp(X) rp(IEX).
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