Show that the random variable n i=1 1 n + (xi x)(x x) SXX

Chapter 12, Problem 12.3.12

(choose chapter or problem)

Show that the random variable n i=1 1 n + (xi x)(x x) SXX Yi where Yi N(0 +1xi,2), 1i n has an expectation and variance 0 +1x and 21 n + (x x)2 SXX

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