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Chapter 6: Q. 6.56 (page 268)

Why is the standard normal curve sometimes referred to as the z-curve?

Short Answer

Expert verified

In the standard normal curve, a dummy variable z-has been used. So, it referred to as the z-curve.

Step by step solution

01

Concept Introduction

In conventional normal distributions, a normal curve is known as the normal random variable, such as a z-score.

The following equation can be used to convert any normal random variable Xinto azscore:

Z=(X-渭)蟽

02

Explanation 

We refer to the zscores on the horizontal axis of the standard normal curve as zscores since the standard normal curve represents a normally distributed variable.

This shows that the z-curve is sometimes indicated as standard normal curve.

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