Dot Plots

A Dot Plot is a graphical display of data using dots.

Example: Minutes To Eat Breakfast

A survey of "How long does it take you to eat breakfast?" has these results:

Minutes: 0 1 2 3 4 5 6 7 8 9 10 11 12
People: 6 2 3 5 2 5 0 0 2 3 7 4 1

Which means that 6 people take 0 minutes to eat breakfast (they probably had no breakfast!), 2 people say they only spend 1 minute having breakfast, etc.

And here is the dot plot:

Another version of the dot plot has just one dot for each data point like this:

Example: (continued)

This has the same data as above:

But notice that we need to have lines and numbers on the side so we can see what the dots mean.

We can use dot plots for percentages, too:

Example: Access to Electricity across the World

Some people don't have access to electricity (they live in remote or poorly served areas). A survey of 102 countries had these results:

Access to Electricity
(% of population)
  Number of
Countries
10   5
20   6
30   12
40   5
50   4
60   5
70   6
80   10
90   15
100   34

So there were 5 countries where only 10% of the people had access to electricty, and so on.

Here is the dot plot:


Percent of Population with Access to Electricity