# Which Chart to Use?

In this worksheet, student decide which graph to use for a given situation.

Key stage:  KS 4

GCSE Subjects:   Maths

GCSE Boards:   AQA, Eduqas, Pearson Edexcel, OCR

Curriculum topic:   Statistics

Curriculum subtopic:   Statistics, Interpreting and Representing Data

Difficulty level:

### QUESTION 1 of 10

There are a number of different types of graph that you can use in statistics. The question you will sometimes need to answer is Which one should I use?

There are a number of situations where you will be told eactlywhich graph to use (Histograms, Scatter Graphs, Cumulative Frequency) but we have to be able to decide between the four others, Bar Charts, Pie Charts, Pictograms and Vertical Bar charts.

The advantages and disadvantages of each type.

Each of the different types of graph have certain advantages and disadvantages, lets look at them.

 Advantage Disadvantage Bar Chart Clear and easy to read Good if you have two sets of data (dual) Does not show proportions Pie Chart Great for comparing proportions We don't know the exact values of each piece unless we are told it. Shouldn't be used for grouped data. Pictogram Good visual impact for simple data Can be difficult to read accurately due to not being able to split pictures up Vertical Bar Chart Clear and easy to read Good if you have two sets of data Quick to draw Does not show proportions

Types of data.

There are two types of data, discrete and continuous data.

Discrete Data is things that can't be split up into smaller units (i.e. Colour, Shoe size, rooms in a house)

Continuous Data is things that can be measured on a scale (Height, weight etc)

Continous Data should be completed using a bar chart or vertical bar chart

Discrete Data can be completed on any of the graphs.

Match the graph to it's advantage.

## Column B

Bar Chart
Clear and easy to read
Pie Chart
Quick to draw
Pictogram
Shows proportions
Vertical Bar Chart
Excellent visual impact

Match the graph to it's disadvantage.

## Column B

Bar Chart
Does not show proportion
Pie Chart
Not accurate for complicated data
Pictogram
Does not show proportion
Vertical Bar Chart
We don't know the exact values

If I wanted to use a graph that showed the proportions of adults and children's favourite crisps, which graph would I use?

Bar

Pie

Pictogram

Vertical Bar

I have the following data for shoe sizes.

 Shoe Size 3 4 5 6 7 8 9 10 11 12 Freqeuncy 1 3 6 10 12 15 6 3 2 1

Which graph would be suitable? Select all that apply

Bar

Pie

Pictogram

Vertical Bar

I want to compare the maximum and minimum temperatures of 5 cities. Which chart should I use for this data.

Bar

Pie

Pictogram

Vertical Bar

When I am comparing the maximum and minimum temperatures of 5 cities. I use a...

Bar

Pie

Pictogram

Vertical Bar

Which graph should you not use for grouped data?

Bar

Pie

Pictogram

Vertical Bar

You can use any of the charts if you have what type of data?

You are producing a report on the hours of sunshine for a holiday brochure.

Which graph should you use to illustrate this?

Bar

Pie

Pictogram

Vertical Bar

I have a pie chart and I want to show the data on a bar chart.

Can I do this?

Yes

No

• Question 1

Match the graph to it's advantage.

## Column B

Bar Chart
Clear and easy to read
Pie Chart
Shows proportions
Pictogram
Excellent visual impact
Vertical Bar Chart
Quick to draw
EDDIE SAYS
You have to match the situation you are given to the graph you want to draw, If you were producing a report, for example, you want to make an impact so a pictogram could be useful. If you want to compare proportions, you would choose a pie chart as the others cannot do this.
• Question 2

Match the graph to it's disadvantage.

## Column B

Bar Chart
Does not show proportion
Pie Chart
We don't know the exact values
Pictogram
Not accurate for complicated data
Vertical Bar Chart
Does not show proportion
EDDIE SAYS
Again, you need to think if the graph is fit for what you want. If, for example, you needed to show proportion, you wouldn't pick a bar chart.
• Question 3

If I wanted to use a graph that showed the proportions of adults and children's favourite crisps, which graph would I use?

Pie
EDDIE SAYS
The key word here is proportion. Which graph shows proportions?
• Question 4

I have the following data for shoe sizes.

 Shoe Size 3 4 5 6 7 8 9 10 11 12 Freqeuncy 1 3 6 10 12 15 6 3 2 1

Which graph would be suitable? Select all that apply

Bar
Pictogram
Vertical Bar
EDDIE SAYS
We would need to know the amount of each, so the only one we should't use here is the pie chart.
• Question 5

I want to compare the maximum and minimum temperatures of 5 cities. Which chart should I use for this data.

Bar
EDDIE SAYS
We are trying to represent more than one data set. The only one we can use here to do this is the...
• Question 6

When I am comparing the maximum and minimum temperatures of 5 cities. I use a...

EDDIE SAYS
When we have more than one set of data to represent, we use a dual bar chart.
• Question 7

Which graph should you not use for grouped data?

Pie
EDDIE SAYS
Because we have grouped data, it is very difficult to use a pie chart. The reason behind this is that for grouped data, we need to order it. All the other charts except pie charts allow this,
• Question 8

You can use any of the charts if you have what type of data?

discrete
EDDIE SAYS
When you have discrete data you can use any type of chart.
• Question 9

You are producing a report on the hours of sunshine for a holiday brochure.

Which graph should you use to illustrate this?

Pictogram
EDDIE SAYS
When you\'re producing a report, you want to make a visual impact and make it easy to read. For this, you should use...
• Question 10

I have a pie chart and I want to show the data on a bar chart.

Can I do this?

EDDIE SAYS
A pie chart only shows proportions, to be able to draw this on any of the other graphs, I need to know what each piece of the pie chart represents. I need more information.
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