5.3 Dot Plots

Each dot in a dot plot is a data point plotted along a horizontal axis. Duplicate values are stacked. In this plot, there are 50 data values represented. The value 6 is present 4 times in the set.

You can also count across multiple columns to answer questions about ranges of responses. For example:

How many times did an even number get picked? Count up the even columns.

The data set doesn't even have to be ordered. You just create a number line that will fit all the data and place a dot above the number for each value in the data set.