The error in the graph is that the percentages add up to more than 100%. For example, the percentages for the 50-54 and 55-59 age groups add up to 82%, which is more than the possible 100%.
This is a common error in bar charts that can occur when people are double-counting data. In this case, it is likely that people who are saving for retirement in multiple ways are being counted twice, once for each savings method.
However, the title of the graph is "Savings by Age Group," so it is more likely that the graph is intended to show the percentages of Americans who are saving for retirement in each age group.
USA Today or NeighborWorks America could fix this error by either removing the double-counted data or by changing the title of the graph to reflect the fact that the percentages are not for Americans who are saving for retirement in each age group.
In the following graph, which shows the percentage of Americans saving for retirement by age group, what error has USA Today or NeighborWorks America made?