A Dot plot also (called Dot chart) is a graphical display of data points which are shown on a simple scale. Each of the dot represents number of observations from a set of data. Dot plots are used for continuous, quantitative, univariate data. They are suitable for limited and small data. Dot plots have a advantage that is conservation of numerical information.
For example: Here is a table given which shows the number of hours per week the same group of 25 students reported spending on homework.
| Hours spent on doing homework | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of students | 1 | 5 | 4 | 3 | 4 | 2 | 3 | 0 | 2 | 1 | 0 |
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