Question

Locating Percentiles under the Normal Curve

Solve the following question.

1.) Find the 99th percentiles of a normal curve.

2.) Find the 40th percentiles of a normal curve.

Answer 1

1) 99th percentiles

$$P(Z<z)=0.99$$

$$z=2.326348$$

2) 40th percentiles

$$P(Z<z)=0.40$$

$$z=-0.253347$$