Data

A variable is the subject matter for which we want data e.g. volume, abundance etc

• Independent
• Dependent
• Controlled

Types of data:

Categorical/ Qualitative 

• Nominal- classes that can't be ranked e.g country name, eye colour, presence/absence etc.
• Ordinal-hierarchies e.g. small-large, excellent-poor, abundant-rare-extinct.

Quantitaive data

• Interval- measurements scale divided into equal units e.g. degrees celsius- 0=asigned
• Ratio- has a true zero point e.g. mm, cm etc

To analyse data- we can use tables, graphs or descriptive statistics:

Graphically we…