What is the critical value?

Question

What is the critical value for z_0.05

Answer 1

To find the z score for 0.05, we have to refer the Area Normal Distribution Table.

zscores are given along the 1st column and 1st row.

The table is populated with probability values or area under normal curve.

The given value is significance level. We have to find its corresponding confidence level. To do that -

0.5 -0.05 =0.45

The z score for 0.45 is the same as the z score for 0.05.

Look for this value in the table. At times you may not get the exact value. Then take the nearest value. The nearest value is 0.4495. Move horizontally to the z score column. The value is 1.6. Then move vertically up to the z-score column. The value is 0.04.

Add these two values 1.6 +0.04 =1.64

The z-score of 0.05 is 1.64.

For further discussion kindly contact with me , I will explain by showing your table in session.