Statistic Graphs

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Statistic Graphs
MNU 2-20b MTH 2-21a MTH 3-21a
What is a Survey
Organising Data
Reading Pictographs
Reading Bar Graphs
Constructing Line Graphs
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Constructing Bar Graphs
Constructing Histogram
Constructing Harder Pie Charts
Constructing Polygon Graph
Reading Pie Charts
Resource Surveys
Constructing Pie Charts
Pie Chart templates
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Aims of the Lesson
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a

• Understand the key points of a survey.
• 2. Construct a survey.

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Think of a survey that you have seen on TV,
online or in the street and explain what it was
about.
Surveys
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a

• What is a survey ?
• Why do we use surveys ?
• What kind of data does a survey have?
• What makes good question ?

Measurements Categories Counts
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Good or Bad survey question
Surveys
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Good or Bad survey question
Surveys
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Good or Bad survey question
Surveys
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Good or Bad survey question
Surveys
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Easy Surveys
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Harder Surveys
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Survey
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Complete the survey you have been given.
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Starter Questions
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Aims of the Lesson
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
1. Understand the term Frequency
Table. 2. Construct a Frequency
Table. 3. Interpret information from Frequency
Tables.
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Easy Surveys
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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We will look at favourite food survey
Frequency tables
Raw data from a survey can often appear untidy
and difficult to understand. Organizing such data
into frequency tables can make it much easier to
make sense of (interpret) the data.
Food Tally Frequency







Sum of Tally is the Frequency
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We will look at the height survey
Frequency tables
Raw data from a survey can often appear untidy
and difficult to understand. Organizing such data
into frequency tables can make it much easier to
make sense of (interpret) the data.
Height Tally Frequency







Sum of Tally is the Frequency
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Frequency Table
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Pick suitable question from your survey and
construct a frequency table.
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Starter Questions
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Aims of the Lesson
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Interpret pictographs.
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What does 1 computer represent
You have 1 minute to come up with a question
Pictographs
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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What does 1 snowflake represent
You have 1 minute to come up with a question
Pictographs
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Pictograph
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Your turn Do exercise
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Starter Questions
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Bar Graphs
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Learning Intention
Success Criteria

1. To explain the main points of a Bar Graph and how
   to construct them.

1. Be able to read information from a Bar Graph.
2. Be able to construct a Bar Graph.
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Bar Graphs
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Bar Graphs
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Bar Graphs
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Bar Graphs
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
A survey of S1 pupils asked what their favourite
pet was. The results are shown below
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Lets construct a Bar graph for the following table
Remember graph has to be labelled and neat !
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What labels should we use for the Bar
Chart Title, Scale, Labels and Units where
appropriate
Favourite Pets
12
10
8
Number of Pupils
6
4
2
0
Cat
Dog
Rabbit
Hamster
Snake
Pets
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Bar Graphs
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Pick a suitable question from your survey and
draw a Bar Graph.
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Histograph
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
The heights in (cm) of 20 S1 pupils are recorded
below.
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Lets construct a Histogram graph for the
following table
Remember graph has to be labelled and neat !
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Histograph
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
First use a table to organise the data.
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Now we can create a Histogram graph
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Pupils Height
What key features should we use for the
Histogram Title, Scale, Labels and Units where
appropriate
12
10
8
Number of Pupils
6
4
2
0
Height
140-144.9
145-149.9
150-154.9
155-159.9
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Making a Polygon Graph Out of a Histograph
Pupils Height
12
10
8
Number of Pupils
6
4
2
0
Height
140-144.9
135-139.9
145-149.9
150-154.9
155-159.9
160-165.9
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Histograph Graph and Polygraph
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Pick a suitable question from your survey and
draw a Histograph and Polygraph.
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Lesson Starter
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Q1.
Q2. How long between 812am to 2.09pm
Q3. 75.9 x 7
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Find arrow value
Q4.
1300
1200
Q5. The answer to a question is 81. Write down
the question.
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Aims of the Lesson
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a

• Interpret information from Line Graphs.
• 2. Construct a Line Graph.

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Starter Questions
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Line graphs
What does trend mean
Line graphs are most often used to show trends
over time.
If the temperature in Aberdeen, in ºC, over a
12-hour period is plotted, the line graph shows
the temperature trend.
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Constructing a Line Graph
A hospital nurse recorded a patients temperature
every hour
Temperature versus Time
Temperature ?C
Time Hours
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Line Graphs
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Pick a suitable question from your survey and
draw a Line Graph.
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Pie Charts
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Learning Intention
Success Criteria

1. To explain the main points of a Pie Chart and how
   to construct them.

1. Be able to read information from a Pie Chart.
2. Be able to construct a Pie Chart.
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Pie Charts
Come up with a question that we can answer using
this Pie Chart.
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Pie Charts
Come up with a question that we can answer using
this Pie Chart.
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Pie Charts
Pie charts can be thought of as circle graphs.
360o
How many degree in a circle
90
How many degrees in one slice 90o
What fraction is each slice of the circle
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Pie Charts
Pie charts can be thought of as circle graphs.
360o
How many degree in a circle
120
How many degrees in one slice 120o
What fraction is each slice of the circle
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Pie Charts
Work out the fraction and degrees for each slice
of the circles.
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Pie Charts
Lets make up our own question
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Pie Charts
The pie chart shows the results of a class survey
into favourite restaurant food.
Write down the fraction of the class that choose
Chinese
Indian
Italian
French
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Pie Charts
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
50 people were asked what was there favourite
holiday
Spain
How many chose
America
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Pie Charts
Count the number of parts the circle is divided
into.
Whole circle is divide into 20 equal pieces
1 piece is equal to
The whole circle represents 100 bottles. How
many bottles does 1 piece represent.
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Pie Charts
What does each part stand for ?
What fraction represents each mealtime ?
There is 100 pupils in the survey?
What is 1/20 of 100.
How many people chose each mealtime?
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
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Easy Pie Charts
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
10
30
20
10
20
10
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15
30
5
15
5
15
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Pie Chart
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
For this question construct a Pie Chart using
the Pie Chart worksheet.
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Pie Charts
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Learning Intention
Success Criteria

1. To explain the main points of a Pie Chart and how
   to construct them.

1. Be able to read information from a Pie Chart.
2. Be able to construct a Pie Chart.
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Total
300
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Rugby
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Football
59
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Cricket
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Squash
Ice Hockey
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Total
90
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Total
90
Guitar
67
Total
90
68
Total
90
Violin
69
Total
90
Violin
Guitar
70
Total
90
Recorder
Violin
Guitar
71
Total
90
72
Total
90
Keyboard
Drum
73
Total
90
Guitar
Violin
Recorder
Keyboard
Drum
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Pie Charts
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Using your survey create a Pie Chart for a
suitable question
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Resources
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a
Download Survey Level D
Download Survey Level E
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Pie Charts 10 Sector Worksheet
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Pie Charts Worksheet
MNU 3-20a MNU 2-20b MTH 2-21a MTH 3-21a