What are one-variable statistics?

One-variable statistics involve data that measure only one characteristic.

Examples:

• Heights of students

• Test scores

• Temperatures

There is only one type of measurement, not relationships between two things.

Common one-variable measures

Mean (average):
Add all values and divide by how many values there are.

Median:
The middle value when data is ordered.

Mode:
The value that appears most often.

Range:
Highest value minus lowest value.

Example

Data: 2, 4, 6, 6, 8

Mean = (2+4+6+6+8)/5 = 5.2
Median = 6
Mode = 6
Range = 8 − 2 = 6