Types of data and graphs Flashcards
Describe what is meant by discrete data and state examples
- Numerical data that can only take
certain values
- e.g. age,shoe size, year group
Describe what is meant by continuous data and state examples
- Numerical data that can take any
value within a range
- e.g. Height, length of journey to school, time spent on
the PS4
Describe what is meant by categoric data and state examples
- Data that is organised into groups or categories
- Gender, favourite colour, brand of trainers, the primary school you went
to
What type of data are bar charts used to represent
Categoric data
What type of data are line graphs used to represent
Continuous
What type of data are scatter graphs used to represent
2x continuous data
What type of data are pie charts used to represent
Categoric data
What type of data are histograms used to represent
Grouped frequencies
What do scatter graphs show
Correlation (relationship) between two continuous variables
What can the line of best fit in a scatter graph be used for
To predict intermediate values
What do line graphs measure
Continuous dependent variable as discrete or continuous independent variable changes
What’s significant about the points being joined on a line graph
We cannot predict intermediate values as we did not measure the dependent variable
Describe properties of a curve of best fit
- Smooth curve (not sketchy)
- Goes through as many points as possible