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CaSQ 3A - What’s the Difference Between Numerical and Categorical Data?
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Data can be classified into two different types.
Values or observations that can be sorted into groups or categories.
Examples: Sex, Eye colour and Favourite colour.
Bar charts and pie graphs are used to graph categorical data.
Values or observations that can be measured. And these numbers can be placed in ascending or descending order. Examples: Height, Arm Span and Weight.
Scatter plots and line graphs are used to graph numerical data.
1. Here are some question topics from CensusAtSchool. Sort them according to whether they will yield categorical or numerical data.
|Amount of money earned last week|
Concentration exercise (seconds)
Dominant hand reaction time
Hours slept per night
|Language mostly spoken at home|
Opinions on environmental conservation
School post code
State/Territory live in
Travel method to school
Travel time to school
2. Why is some data that contain numbers, such as post codes and birth dates considered categorical?
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This page last updated 12 November 2013