DESCRIBING DATA: 1. FREQUENCIES and FREQUENCY DISTRIBUTIONS.

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Presentation transcript:

DESCRIBING DATA: 1

FREQUENCIES and FREQUENCY DISTRIBUTIONS

Example of a frequency distribution for a NOMINAL variable

Example of a frequency distribution for an ORDINAL variable

INTERVAL Data: Problem. So many distinct values

Alternative solution. Grouped frequency distribution consisting of CLASS INTERVALS.

The issue of interval width Rule of thumb: –no fewer than 10 and no more than 20 intervals

Percentaging Frequency Distributions

Percentaging is particularly useful for two-way frequency tables

Graphic representations/ Bar Chart

Graphic representation/ Pie Chart

Graphic representation of a two- way table/ Clustered Bar Chart

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