##### Asked by: Aguasantas Ces

asked in category: General Last Updated: 7th March, 2020# What does Z score mean?

**z**-

**score**(also called a standard

**score**) gives you an idea of how far from the

**mean**a data point is. But more technically it's a measure of how many standard deviations below or above the population

**mean**a raw

**score**is. A

**z**-

**score**can be placed on a normal distribution curve.

Furthermore, how do you interpret z score?

A positive **z**-**score** indicates the raw **score** is higher than the mean average. For example, if a **z**-**score** is equal to +1, it is 1 standard deviation above the mean. A negative **z**-**score** reveals the raw **score** is below the mean average. For example, if a **z**-**score** is equal to -2, it is 2 standard deviations below the mean.

Beside above, what is a high z score? A **high z** -**score** means a very low probability of data above this **z** -**score** and a low **z** -**score** means a very low probability of data below this **z** -**score**..

Then, what is Z score used for?

Standard **Score**. The standard **score** (more commonly referred to as a **z**-**score**) is a very useful statistic because it (a) allows us to calculate the probability of a **score** occurring within our normal distribution and (b) enables us to compare two **scores** that are from different normal distributions.

Is a high z score good or bad?

A value **higher** than the mean has a positive **Z**-**score**, while a value lower than the mean has a negative **Z**-**score**. A value equal to the mean has a **Z**-**score** equal to zero. **Z**-**scores** also enable comparisons of data **values** across different distributions. **Values** of 100 in one distribution vs.