You will learn how to do mathematical calculations and how to insert a probability chart (to be exact, it is a normal distribution probability plot).

Probably, it is the Excel tutorial that solves your issue.

## Data preparation

First, you need data that looks like this:

Select the Home tab.

Click on a value in the data, and Sort & filter to choose Sort from smallest to largest.

Start another column, with one in between, and label it "i".

Start another column, and label it formula.

Click on D2 (1), and type =(C2-0,375)/(6+0,25)(2), and press enter.

Double click on the small square in the right bottom corner of the cell.

Label Column B as the Expected Z.

## NORM.S.INV formula

Click on B2 (1), and type =NORM.S.INV(D2) (2)

Double click on the small square shown in the result from the previous step.

## Inserting a normal distribution plot

Highlight A2-B8 (1), click on insert (2), scatter chart (3), and choose the desired chart (4) to plot the normal distribution chart.

The Probability Chart is ready:

In conclusion, in the picture above, you see #NUM! This means the formula in D8 is above 1, and therefore it is not possible to be part of the probability.