# Statistics Examples

, , , , , , , , ,

Step 1

The class width can be found by finding the difference of the maximum data value and the minimum data value (range of data) divided by the number of classes.

Step 2

The number of classes can be estimated using the rounded output of Sturges' rule, , where is the number of classes and is the number of items in the data set.

Step 3

Select classes for this example.

Step 4

Find the data range by subtracting the minimum data value from the maximum data value. In this case, the data range is .

Step 5

Find the class width by dividing the data range by the desired number of groups. In this case, .

Step 6

Add one to to get the size of each group.