A bar chart (bar graph) is a graph consisting of bars visually representing the frequency of objects or groups.

A pictogram (pictograph) is a graph consisting of pictures to visually represent the frequency of objects or groups.

Checking understanding of bar charts and pictograms

Maths

Checking understanding of summary statistics from a list

Checking understanding of summary statistics from a frequency table

Calculating summary statistics from a grouped frequency table

Calculating the mean from a grouped frequency table

Constructing stem and leaf diagrams

Calculating summary statistics from stem and leaf diagrams

Checking understanding of measures of central tendency

Comparing data sets in context

Checking understanding composite and bar-line charts

Statistical summaries using technology

Checking understanding of pie charts

Comparing various representations of data sets

Problem solving with comparisons of numerical data

In this unit, pupils began to compare two different sets of data. In the future unit, pupils will consider cumulative frequency graphs and histograms and compare the data from these diagrams to other graphical representations.

In the prior unit, pupils considered the mean, median and mode and evaluated their usefulness in a variety of contexts. In this unit, pupils extend this learning to comparing two different data sets and comparing these measures of central tendency.

In this unit pupils will compare two different data sets and compare different measures of central tendancy when interpreting the data. Pupils will learn to interrogate frequency tables and stem and leaf diagrams both with and without technology.

Comparisons of numerical summaries of data

Each icon is worth 20 tonnes of recycling. The pictogram shows that {{ }} tonnes of plastic were recycled.

A vet records the number of each type of pet that they saw in one week in their surgery. The bar chart shows their results. The bar chart represents {{ }} pets in total.

More than half of the apples picked over the 3 weeks were picked in week 1.

A total of 14 apples were picked in the three week period.

10 more apples were picked in week 2 than week 3.

20 more apples were picked in week 1 than in week 3.

The pictogram shows the number of apples picked in an orchard over a three week period. Which of the following statements are correct?

There were 181 items across the four boxes.

Which of the following statements are correct about the data represented on this bar chart?

Izzy has three boxes. Each box contains 37 items. Altogether Izzy has {{ }} items.

A multipack of crisps contains 14 packets. Jacob needs a total of 56 packets of crisps for the year 7 disco.  Jacob should buy {{ }} multipacks.

Which of these tally marks shows a frequency of 7?

The missing number on this scale is {{ }}.

Two numbers are missing on this scale. What is the scale increasing by?

The {{ }} is the number of times an event occurs; or the number of individuals (people, animals etc.) with some specific property. 

Checking understanding of bar charts and pictograms

Lesson outcome