The bubble chart below examines the correlation between the number of athletes that a country sends to the Olympics and the number of medals it wins per athlete. The data averages results from the last 3 summer Olympics Games for the top 20 medal winning countries. The X-axis represents the average team size, the Y-axis shows the average medals per athletes, and the bubble area matches the average medals won.
The data suggests that the more athletes a country sends the more medals they win per athlete. Cuba, an exception, has won more medals per athlete than expected given its average team size. This might be because they try and specialize in specific sports including boxing, athletics, and judo.
Bubble chart showing average Olympic team size and medals won per athlete for the last 3 games
This chart was built using the Aploris PowerPoint add-in. Aploris helps business professionals quickly build insightful charts.
The bubble chart below shows the number of people without access to improved water in select countries. The area of the bubble is proportional to the number of affected people. The x-axis is used to indicate what percent of the population this represents and the y-axis is the 2014 GDP. Note that the y-axis uses a log axis to effectively show the broad range of GDPs.
As you might expect, there seems to be a correlation between the country’s GDP and its ability to provide improved water to its residents.
Bubble chart showing number of people without access to improved water, percent of population affected, and GDP for select countries
This bubble chart was built using the Aploris add-in on an Apple MacBook Pro running Office for Mac. The bubble sizes, axes properties, and legend are all easily controlled with the Aploris add-in.
Bubble chart showing largest US startups defined as privately owned companies. Companies are plotted along two axes showing current revenue and total funding received so that the ranking is easily visible. No observable trend or correlation exists between both dimensions.
Uber has received exceptional funding. In order not to squeeze other bubbles together an axis break has been used for the x-axis.
A third dimension is added with bubble areas being proportional to the current company valuation. Though exact values are not easy to read, differences are made clear. Technically, a fourth dimension with discrete values is added by grouping bubbles by color. Companies that are headquartered outside the Silicon Valley receive a distinct color.
Bubble chart showing revenue and funding for US startups