Let X be a normal random variable with μ = 12 and σ = 2. Find the value of the given probability. (Round your answer to four decimal places.)

Question

P(7 < X < 9) =

Answer 1

P(7<X<9)
=Z((9-12)/2)-Z((7-12)/2)
=Z(-3/2)-Z(-5/2)
=0.0668072-0.006209665
=0.6060