Bar Chart
Level 4 / 5
LO: Construct bar chart for
discrete and continuous data
Starter:
What is discrete data? Give examples of a discrete
data
What is continuous data? Give examples of a
continuous data
• Discrete data: describes the situation when
each category is separate from the others.
Example, colours, chocolate bars or shoe sizes.
• Continuous data: describes the situation when
you are using a quantity where gaps in
between always mean something. Anything
you measure is continuous like time, or height
What difference do you notice between discrete
bar chart compared to the continuous?
Discrete data: You put a small gap between the bars. The
labels for the bars go in the middle, underneath the bar.
Continuous data: You must not leave a gap. The labels go
under the tick marks at the beginning and end of the bars.
Type of pet
cat dog rabbit bird other
Number of pets
30 28
10 15 23
categories
When you draw graphs what are the three items we need?
Title
Scales
Labelling the axis
Frequency
Why is height on the x axis?
Why is number of people on the y axis?
Do the worksheet
• 1a) 2
b) Brown c) 23 students
12
2.
10
8
6
Series1
4
2
0
Blond
Brown
Red
Black
3a) Continuous data
4a) 12,000 sales b) 21,000 sales c) In general the
sales increase year on year
Fill in the blanks
• The difference between a continuous bar
chart and a discrete bar chart
• The difference between a continuous and
discrete graph is…….
• Independent variable is…. whereas dependent
variable….
• Hand in your homework