## Answers

Gren that Xu NM , 2 4.2 H= 35.4 the ast month and X, and do oth mendh. represent of the saintal D = X-Mo ECD)= E(X, Xco) E(X) - E(Xol 35.4-.3.5-4 a) LETD)= and Vor (D) = var( x - xco) - Lav (x) + carcato) X and Xo are independent o2 ton 262 Standard deviation of D = 1202 -FE 4.2 x 12 1 5.981 so of D optico (B) is correct Theun S:D 5.9 This CS Scanned with CamScanner

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