finding probabilities

Statistics
Tutor: None Selected Time limit: 1 Day

Apr 2nd, 2015

(a) 

z value = (80.5-81)/1.1 = -0.4545= -0.45

P ( z < -0.45) =0.326355 = 0.3264

(b)

z value= (80.5-81) * sqrt(42)/1.1= -2.94579 = -2.95

P(z<-2.95) =0.001589= 0.0016

Apr 2nd, 2015

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Apr 2nd, 2015
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Apr 2nd, 2015
Dec 6th, 2016
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