Given a standard normal distribution with a mean of 0 and a

Given a standard normal distribution (with a mean of 0 and a standard deviation of 1).

a. the probability that Z is less than -0.26 or greater than the mean is _________

b. The probability that Z is less than -0.26 or greater that 1.02 is ______________

Solution

a) P(Z <-0.26) + P(Z >0) = 0.3974+0.5 = 0.8974

b) P(Z<-0.26) + P(Z > 1.02) = 0.3974 + 0.1539 = 0.5513