SOLUTION: IQ is normally distributed with mean, u=100, and standard deviation o=20. what is the probability of selecting a random sample of size 100 with mean IQ larger than 105?

Algebra ->  Probability-and-statistics -> SOLUTION: IQ is normally distributed with mean, u=100, and standard deviation o=20. what is the probability of selecting a random sample of size 100 with mean IQ larger than 105?      Log On

 

Hi,

μ = 100 ,  σ = 20 

P(x>105) = 1 - P(x ≤ 105) = 1 - P()

                          = 1 - P(z ≤ 5/2)=.0062