Types of data and graphs

Question 1

Describe what is meant by discrete data and state examples

Answer 1

- Numerical data that can only take
certain values
- e.g. age,shoe size, year group

Question 2

Describe what is meant by continuous data and state examples

Answer 2

- Numerical data that can take any
value within a range
- e.g. Height, length of journey to school, time spent on
the PS4

Question 3

Describe what is meant by categoric data and state examples

Answer 3

- Data that is organised into groups or categories
- Gender, favourite colour, brand of trainers, the primary school you went
to

Question 4

What type of data are bar charts used to represent

Answer 4

Categoric data

Question 5

What type of data are line graphs used to represent

Answer 5

Continuous

Question 6

What type of data are scatter graphs used to represent

Answer 6

2x continuous data

Question 7

What type of data are pie charts used to represent

Answer 7

Categoric data

Question 8

What type of data are histograms used to represent

Answer 8

Grouped frequencies

Question 9

What do scatter graphs show

Answer 9

Correlation (relationship) between two continuous variables

Question 10

What can the line of best fit in a scatter graph be used for

Answer 10

To predict intermediate values

Question 11

What do line graphs measure

Answer 11

Continuous dependent variable as discrete or continuous independent variable changes

Question 12

What’s significant about the points being joined on a line graph

Answer 12

We cannot predict intermediate values as we did not measure the dependent variable

Question 13

Describe properties of a curve of best fit

Answer 13

• Smooth curve (not sketchy)
• Goes through as many points as possible