Please agree to accept our cookies. If you continue to use the site, we'll assume you're happy to accept them. # 2.26 Mean average and equal shares

Created on 28 August 2019 by ncetm_administrator
Updated on 30 August 2019 by ncetm_administrator

## Introduction

Understand the concept of mean average and learn how to find the mean of a set of data. Use the mean to compare sets of data and learn when it is appropriate to use the mean.

## Teaching points

• Teaching point 1: The mean is the size of each part when a quantity is
shared equally.

• Teaching point 2: The mean is defined as the sum of all the numbers in a set of data divided by the number of numbers/values that make up the set of data. If we know the mean of a set of data and the number of numbers/values in that set, we can calculate the total of the set. The mean of a set changes if the total value of the set changes or if the number of numbers/values in the set changes.

• Teaching point 3: The mean can be used to compare data.

• Teaching point 4: The mean is not always an appropriate representation of a set
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