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Chapter 6: Q. 6.74 (page 269)

Obtain the z-score that has an area 0.80to its left under the standard normal curve.

Short Answer

Expert verified

The z-score under the usual normal curve with the area 0.80 to its left is around 0.84.

Step by step solution

01

Given information

The given area is0.80.

02

Explanation

The given area is 0.80

Begin by looking for the 0.80area in the table's body. The item isn't on the table. 0.7995is the nearest area. The matchingz-score for that area is 0.84.

As a result, the z-score under the usual normal curve with the area 0.80to its left is around 0.84, which may be depicted as

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

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