**In this module, you can study the basic statistical measures: mean, median and mode.**

** **

When most people say "average" they are talking about the **mean** of a data set.

However, the** mean, median** and **mode** are actually all "averages."

Some data sets have no mode, and some have more than one mode!

**Study and practice**

- Study meanThis page from mathsisfun.com provides several examples showing how to calculate the mean of a set of numbers. One of the examples involves negative numbers. At the end, you can link to "the mean machine" or take a quiz. For a more advanced discussion about mean, see http://www.onlinemathlearning.com/mean.html.
- Study medianRead about the median at mathsisfun.com. At the bottom of this page, you can try finding the median of different data sets, and you can take a quiz on medians. For a more advanced discussion of median, see www.onlinemathlearning.com/median.html.
- Quiz yourself on mean, median and modeThis page from mathsisfun.com provides a quick overview of mean, median and mode and then has a quiz at the end.

0.00 min addition (+), subtraction (-), multiply (x), divide (÷)

1.19 min decimal point

2.43 min C, CE and backspace

4.19 min square, square root & fractions

6.17 min percentage (%)