·This data describes the quality of something in
a non-numerical format.
·Counts can be applied to qualitative data, but
you cannot order or measure this type of variable. Examples are gender, marital
status, geographical region of an organization, job title….
·Qualitative data is usually treated asCategorical variable.
With categorical data, the
observations can be sorted according into non-overlapping categories or by
characteristics. For example, shirts can be sorted according to color; the
characteristic 'color' can have non-overlapping categories: white, black, red,
etc.People can be sorted by gender with
categories male and female. Categories should be chosen carefully since a bad
choice can prejudice the outcome. Every value of a data set should belong to
one and only one category.