## What Is Z-Score?

**Z-Score** is a special type of value that indicates how far the value is from the mean. The general formula for the Z-score is:

**Z**represents the value of the Z-score**XÂ**is the value of any case**Âµ**stands for the mean value**Ïƒ**represents the value of the Standard Deviation

**Read More:** How to Calculate Z Score in Excel

## What Is Probability?

Probability represents the possibility of occurring any events with respect to the total number of events. The mathematical expression of probability is:

## How to Calculate Probability from Z-Score in Excel with Quick Steps

We’ll consider a dataset of **10** students at a school. The names of the students are in column **B** and their examination marks are in column **C**.

### Step 1 – Estimate the Mean Value of the Dataset

- Select cell
**F5**. - Insert the following formula in the cell.

`=AVERAGE(C5:C14)`

- Press
**Enter**.

- You will get the value of the mean of our dataset.

### Step 2 – Evaluate the Standard Deviation

- Select cell
**F6**. - Use the following formula in the cell.

`=STDEV.P(C5:C14)`

- Press the
**Enter**key.

- You will get the value of the standard deviation.

### Step 3 – Determine the Z-Score

- Insert a
**Column**between columns**C**and**D**. - Rename the column as
**Z-Score**.

- Select cell
**D5**and use the following formula in the cell:

`=(C5-$G$5)/$G$6`

- Press
**Enter**.

**Double-click**on the**Fill Handle**icon to copy the formula down to cell**D14**.

- You will get all the values of
**Z-Scores**for the datasheet.

### Step 4 – Calculate the Probability for Each Data Point

- Insert a
**Column**between columns**D**and**E**. - Rename the column as
**Probability**.

- Select cell
**E5**and insert the following formula for the cell:

`=NORM.DIST(C5,$H$5,$H$6,TRUE)`

- Press
**Enter**.

**Double-click**on the**Fill Handle**icon to copy the formula down to cell**E14**.

- You will get all the values of probability.

** Interpretation of the Result**

We are illustrating the result for cell **E5**. The value of probability is **0.664**. The value means that the possibility of happening that event is **0.664** with respect to the total number of events.

**Read More:** How to Calculate P Value from Z Score in Excel

**Download the Practice Workbook**

## Related Articles

- How to Calculate Critical Z Score in Excel
- How to Calculate Altman Z Score in Excel
- How to Calculate Z-Score with 95 Confidence Interval in Excel

**<< Go Back to Statistical Significance in Excel | Excel for StatisticsÂ |Â Learn Excel**