a. Suppose Z is Normally distributed (0,1). What value of z* makes the following equation true? P( -z* < Z < z* ) = 0.45. b. What is the 75th percentile of the standard normal distribution? Solution P(-z-z)=1-P(Z<-z)=1-No(-z) No(-z)=1-No(z) P(-z z=0.6 b) P(Z.