STANDARDIZE function
Returns a normalized value from a distribution characterized by mean and standard_dev.
Syntax
STANDARDIZE(x,mean,standard_dev)
X is the value you want to normalize.
Mean is the arithmetic mean of the distribution.
Standard_dev is the standard deviation of the distribution.
Remarks

If standard_dev ≤ 0, STANDARDIZE returns the #NUM! error value.

The equation for the normalized value is:
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example

Create a blank workbook or worksheet.

Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help

Press CTRL+C.

In the worksheet, select cell A1, and press CTRL+V.

To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

