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6. (a) A finite population with N = 450 has a mean u = 112.5 and standard deviation o = 17.3. For samples of size n = 41, ans

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ca Let shen, Solulian :6 Given M = 112.5 and 8 = 17.3 and sample size (n=41 be the sample le mean Var (F) = (17.3)2 41 02 w =and ng = 40 b n = 32 M = 12.3 and Cl =9.8 6 = 2.9 and 62=2.4 Let T = 7 - X2 Then E(T) = E(X, -72) = E(F)- Elis) ī cei - Mr īä 2- E(T) こ < @ PC F - Fg <2) =P( X-X2 - E(T) ſvart) ſvarli =P(z< 2-2.5 ✓0.0514 = P(24 Joose = P(Z <-2.2054) -0.5 -0.0137 HenPC га) Р S76? (6) 7 262 3) = P( Eman-e? ах S-76 9:41 11.52 8 ЧІ > 13698) - PF31,39) ? О. 179 емес, PC 2 ) - с. (749 5, 2

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