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Variables - Continuous - Ordered - Categoric - Discrete.

There are different types of
variable

and some give you more information than others.

A variable which can have any
numerical
value

is called a continuous variable.

Continuous variables give you
the most information

and can be plotted as a line graph.

Examples of continuous variables are length,

temperature, time,
weight,
voltage, and
many more.

A variable which belongs to a
particular category is called
a

categoric variable. A category is a name of a group of
things.

Categoric variables give you less information than

continuous variables. They can be shown using bar charts.

Examples of categoric variables are elements, compounds,

metals and
insulators.

Some categoric variables
have groups within them

and the groups are called ordered variables.

Ordered variables give you more information than

categoric variables but less information than

continuous variables. An example of an ordered variable

would be
small, medium or large
lumps of calcium carbonate.

Finally, a variable which can only
have whole numbers

is called a discrete variable. Whole
numbers are

called integers.
Examples of discrete variables

would be the number of wires in a
cable, the number

of people in a group or the number of rings of bark in a
tree.

Scientists look for links between variables to explain the data.

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