Dotplots
Enter one or two sets of quantitative data and this tool will draw a dotplot, stacking dots for repeated values. If both data sets are filled, a stacked dotplot is drawn using a common number line.
Dotplots
Statistics • Organizing and Graphing Data
Frequently Asked Questions
What is a dotplot and what does it show?
A dotplot is a graph for quantitative data where each observation is shown as a dot above its value on a number line. It makes clusters, gaps, and possible outliers easy to see while keeping individual values visible.
Why do dots stack on a dotplot?
Dots stack when the same value occurs multiple times. The height of the stack shows the frequency for that value.
How do I make a stacked dotplot to compare two data sets?
Enter values for both Data set A and Data set B. The calculator will draw a stacked dotplot using the same horizontal axis so the two distributions can be compared directly.
How should I format the input values for this dotplot calculator?
Enter numeric values separated by spaces, commas, semicolons, or line breaks. Non-numeric entries should be removed so the plot represents quantitative data correctly.
When is a dotplot better than a histogram?
Dotplots are especially useful for small to medium data sets because every observation is shown. Histograms are often preferred for very large data sets where individual values are less important than overall bin counts.