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DESCRIBING DATA: 1
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FREQUENCIES and FREQUENCY DISTRIBUTIONS
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Example of a frequency distribution for a NOMINAL variable
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Example of a frequency distribution for an ORDINAL variable
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INTERVAL Data: Problem. So many distinct values
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Alternative solution. Grouped frequency distribution consisting of CLASS INTERVALS.
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The issue of interval width Rule of thumb: –no fewer than 10 and no more than 20 intervals
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Percentaging Frequency Distributions
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Percentaging is particularly useful for two-way frequency tables
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Graphic representations/ Bar Chart
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Graphic representation/ Pie Chart
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Graphic representation of a two- way table/ Clustered Bar Chart
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