Question

please help with excerise confusedUsing the Normal Distribution to find the Z-value: Find the Z-value for the following cumulative areas:A) A=36.32% B) A= 10.75% C) A= 90% D) A= 95% E) A= 5% F) A= 50%

Answer 1

The normal distribution can be used in two ways:

* Given the z-value, find the left-tail area

* Given the left-tail area, find the z-value.

We cannot manually find any of those values, we need some automatic (online or offline) tool for that. We use Excel.

a) A = 36.32% = 0.3632

Use the inverse normal distribution table to find z = -0.35

b) A = 10.75% = 0.1075

Use the inverse normal distribution table to find z = -1.24

Use the same procedure to find the rest of the z-values.