Data Flashcards
What is an element?
The entities on which data is collected
What is a variable?
A characteristic of interest for the elements.
What is an observation?
The set of measurements obtained for a particular element.
Categorical data
Data classified by category rather than number
Numerical Data
Data that is appropriate for arithmetic operation
Nominal Data
Categorical data that has no natural ordering
Ordinal Data
Categorical data that has a natural ordering
Discrete Data
Numerical Data that arises from a count
Continuous data
Numerical Data that is measured on a continuous scale
Summarising Data objective is…
Take a set of data (numbers) and summarise it into a form that is understandable and meaningful
Make imports ants aspects of data stand out
Tabular
Frequency tables
Graphical
- Bar charts
- Pie diagrams
- Histograms
- Scatterplots
- Time Series plots
