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DESCRIBING DATA: 1. FREQUENCIES and FREQUENCY DISTRIBUTIONS.

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Presentation on theme: "DESCRIBING DATA: 1. FREQUENCIES and FREQUENCY DISTRIBUTIONS."— Presentation transcript:

1 DESCRIBING DATA: 1

2 FREQUENCIES and FREQUENCY DISTRIBUTIONS

3 Example of a frequency distribution for a NOMINAL variable

4 Example of a frequency distribution for an ORDINAL variable

5 INTERVAL Data: Problem. So many distinct values

6 Alternative solution. Grouped frequency distribution consisting of CLASS INTERVALS.

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

8 Percentaging Frequency Distributions

9 Percentaging is particularly useful for two-way frequency tables

10

11 Graphic representations/ Bar Chart

12 Graphic representation/ Pie Chart

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


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