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

Checking understanding composite and bar-line charts

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 of bar charts and pictograms

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

Select the charts which are examples of bar or bar-line charts.

This composite bar chart shows the ice-cream sales for two different parlours. How many vanilla flavoured (V) ice creams were sold in parlour 1?

This composite bar chart shows the ice-cream sales for two different parlours. How many strawberry flavoured (S) ice creams were sold in parlour 2?

This composite bar chart shows the ice-cream sales for two different parlours. What was the total number of chocolate flavoured (C) ice creams sold across both parlours?

This composite bar chart shows the ice-cream sales for two different parlours. What is the difference in mint flavoured (M) ice cream sales between the two parlours?

True. Any icon can be used to represent a given value.

True. The icons are sized differently to represent different values.

False. Icons should be simple and representative.

True or false? Pictograms can use any icon.

Bar charts should have gaps when displaying __________ or __________ data.

Each icon is worth 6 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. What percentage of the pets seen were fish?

Under 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 fewer apples were picked in week 2 than week 3.

20 fewer 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 171 items across the four boxes.

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

Checking understanding composite and bar-line charts

Lesson outcome