Q. 6.72 - Elementary Statistics

Question

Determine the $z$-score for which the area under the standard normal curve to its left is $0.01$.

Step-by-Step Solution

Answer

The z-score under the usual normal curve with the area $0.01$ to the left is around $-2.33.$

Step 1: Given information

The area given area is $0.01$.

Step 2: Explanation

The given area is$-0.01$

Begin by looking for the area $0.01$ in the table's body. The item isn't on the table. $0.0099$ is the nearest area. The matching z-score for that area is$-2.33$.

As a result, the z-score under the usual normal curve with the area $0.01$ to the left is around $-2.33$, which may be depicted as

Below is a section of the standard normal table that is relevant: