Read a dot plot by first looking at the overall shape of the data.A dot plot that is relatively bell-shaped will indicate a “normal distribution.” One that is skewed to the left or right indicates outliers. Create a corresponding number of markings (dots) above each data point.That’s it! Next, it’s time to analyze the display. These can be tens, whole numbers, numbers measured to the nearest tenth, numbers measured to the nearest hundredth, etc.List these values or ranges from least to greatest left to right.Next, find out how often each data point occurs. Otherwise, use discrete values as the data points. To make a dot plot, first look at the data gathered.Is the data continuous? What is its range?It may be better to have a dot plot with a range for continuous data or data with very large ranges. Using a dot plot makes it easy to see outliers, clusters, and the mode of a data set. For example, a wildlife researcher may use a small graphic of an animal.This display works well for small to medium-sized data sets. For example, a dot plot showing body temperature may vary in increments of $0.1$ degrees Fahrenheit.In any case, the values will increase from left to right or top to bottom in dot plots.Despite the name, some dot plots may use other images instead of dots. Additionally, the values listed at the bottom may be ranges or in increments smaller than one depending on the data. It does this by listing all possible data values on the bottom and showing one dot above the value for each time that data value occurs.In some cases, the dot plot lists the values on the left, with the dots extending to the right. It displays the same general information as stem and leaf plots and histograms.Before moving forward with this section, make sure to review relative frequency.This section covers:Ī dot plot is a graphical display of data that emphasizes the overall shape of quantitative data. See (Figure).Dot Plot – Definition and Examples A dot plot is a graphical display of data that shows how often each data point or a range of data points occurs.A dot plot is great for emphasizing the overall shape and distribution of a data set.
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