TOM302 HW CH82 - TOM302 HW#CH8 8.12 X 190000 50000 N=40...

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TOM302 HW #CH8 8.12 190000 = μ 50000 = σ N=40 40 50000 = X σ = 7905.14 P(z> 14 . 7905 190000 200000 - ) = 1.26 P(z>1.26) = 0.5-0.3962 = 0.1038 8.19 N=50 7 . 5 = x μ 35 . 0 50 5 . 2 = = x σ P(z 4890 . 0 5 . 0 ) 29 . 2 ( ) 35 . 0 7 . 5 5 . 6 + = = - z P = 0.9890 8.25 a. 426 . 0 = π b. p= 70/200 = 0.35 c. 035 . 0 200 ) 426 . 0 1 ( 426 . 0 ) 1 ( = - = - = n p π π σ d. P(p ) 35 . 0 = P(z ) 035 . 0 426 . 0 35 . 0 - =P(z 9850 . 0 4850 . 0 5 . 0 ) 17 . 2 = + = - 8.37 N=40, 2 . 0 = π 059 . 0 1 300 40 300 * 40 ) 2 . 0 1 ( 2 . 0 = - - - = p σ P(p 3023 . 0 5 . 0 ) 85 . 0 ( ) 059 . 0 2 .
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