A graph shows how many people got this score on the vertical axis. Points is listed on the horizontal axis. There is a standard distribution with 1 and 2 with 1; 3 has 3; 4 has 5; 5 has 3; 6 has 2; 7 has 1; and 9 has 1.
You can use the plus and minus keys to change values.
| Mean | 4.4 |
| Standard deviation | 1.9 |
You can add or subtract numbers to the distribution on the graph and see how the changes affect the mean and standard deviation. Let’s start by adding a 4: Select the number 4 button and then the plus key or button.