Let Z be the standard normal variable Find the values of a t

Let Z be the standard normal variable. Find the values of a that satisfy the given probabilities. (Give your answers to four decimal places.)

(a) P(Z > a) = 0.1497
a =  

(b) P(Z < a) = 0.1121
a =

Solution

Let Z be the standard normal variable. Find the values of a that satisfy the given probabilities. (Give your answers to four decimal places.)

a) using tables

we will find a value of Z for a probability of 0.1497

z = 1.04

b)

a = 1.21