Exam III 12 Find the indicated area under the normal curve 1

Exam III 1-2) Find the indicated area under the normal curve 1. To the left of z = 0.33 Between z = -1.55 and z = 1.0

Solution

1)

P(Z <0.33) = phi(0.33) = 0.6293 where phi is the normal distribution function

2)

P(-1.55 < Z < 1) = P( Z <1 ) - P( Z <-1.55)

= phi(1) - phi(-1.55)

= 0.8413 - 0.0606

= 0.7807