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P0105_Soln - P0105_Soln X N 57 ~ 71 PX 4 <0 Recall that X N...

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P0105_Soln.doc X ~ N 75 ,17 ( 29 PX < 40 ( 29 Recall that… X ~ N μ , σ ( 29 Z = X - μ σ Z ~ N 0 ,1 ( 29 Thus, PX < 40 ( 29 = PZ < 40 - 75 17 PX < 40 ( 29 = PZ <- 2 .06 ( 29 PX < 40 ( 29 =Φ- 2 .06 ( 29 PX < 40 ( 29 = 1 2 .06
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