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| 5. | Descriptive Statistics |
| 5.1 | Introduction |
| 5.1.1
What is statistics?
5.1.2 Descriptive statistics 5.1.3 Population and sample 5.1.4 Parameter and statistic |
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| 5.2 | Table representation |
| 5.2.1
Types of data
5.2.2 Raw data 5.2.3 Frequency distributions 5.2.4 Relative frequency and percentage distributions 5.2.5 Grouped frequency distributions 5.2.6 Constructing grouped frequency distribution tables |
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| 5.3 | Graphical representation |
| 5.3.1
Bar graphs
5.3.2 Pie charts 5.3.3 Histograms 5.3.4 Polygons |
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| 5.4 | Measures of central tendency |
| 5.4.1
Mean
5.4.2 Median 5.4.3 Mode |
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| 5.5 | Measure of variability |
| 5.5.1
Range
5.5.2 Variance and standard deviation |
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| 5.6 | Mean, variance and standard deviation for grouped data |
| 5.6.1
Mean for grouped data
5.6.2 Variance and standard deviation for grouped data |
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| 5.7 | Reference |
