3 Variable Types, Levels

8/13/2012

Variable Types :

• Qualitative/Categorical : variables are variables
that are given category names instead of
numbers two levels of categorical variables are
• 1. Nominal (Không thứ bậc): variables which is a
purely classification variable, where there is no
order or ranking such as color, yes or no items AB
or C.
• 2. Ordinal (Có thứ bậc) items are still placed in
categories but the categories can now be ranked,
for example “ strongly agree” “ agree” so on

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8/13/2012

• Quantitative variables : require numerical
response. There are two levels of quantitative
variables
• 1. Discrete: variables are numerical variables
that can only increase in steps – usually they
can only be integers for example, number of
siblings, number of text messages – things you
can count

• 2. Continuous : variables are variables that
can increase or decrease continuously for

example height, length, weight.

• When you rate something from 0 – 1, you are
putting something into categories that can be
ranked. The type will be qualitative, the level
ordinal.

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