# How are z-scores used in the standardization of test scores?

##### 1 Answer

Oct 22, 2015

Good Question.

#### Explanation:

z-score changes your date mean to 0 and the standard deviation to 1.

Working with different data, you mean and standard deviation are different with the data you use. To find probability by using the table you have the standardize your data.

This is to make it easier the compare different data.