The mean average is a single number expressing the typical value in a set of data. It is calculated by finding the total of the set of data and dividing by how many values there are.

A set of data is collection of facts, such as numbers, words, measurements, observations or even just descriptions of things.

Explain the relationship between the mean and sharing equally

Maths

Explain how to calcluate the mean of a set of data including a value of zero

Explain how the mean changes when the total quantity or number of values changes

Explain how to use the mean to make comparisons between two sets of data

Explain why the mean is useful and when it is not appropriate

In this unit pupils will learn how to calculate the mean of a set of data and use the mean to make comparisons between two sets of information. In the future unit pupils will calculate and compare the mean, median and mode of a set of data.

In the prior unit pupils interpreted and constructed pie charts and line graphs and used these to solve problems. They read scales and made links to fractions, angles, percentages and understanding proportional relationships. In this unit pupils will learn how to calculate the mean of a set of data and use the mean to make comparisons between two sets of information.

In this unit pupils will learn how to calculate the mean of a set of data and use the mean to make comparisons between two sets of information where appropriate.

Mean average

Look at the amount of cards. Who now has fewer cards after they have been re-shared?

Look at the table. How many cards will the children have each if they share them equally? 
Lucas has started to work this out for you. 
12 + 8 + 8 + 4 = 32

Laura wants to reshare the cards so that the children all have an equal amount. Calculate the equal share.

The {{ }} is calculated by finding the total of the set of data and dividing by how many values there are.

Look at the table. Match the shape that represent the parts of the data.

Look at the table. What is the mean average of the spelling test scores for Pine class?

Explain the relationship between the mean and sharing equally

Lesson outcome