Suppose that a group of U.S election reformers argues that switching to a system based on proportional representation PR would significantly increase turnout skeptics claim that the reform would not have a significant effect on turnout. The following table, which reports mean turnouts and accompanying standard errors of PR and non-PR countries will help you determine which side -the reformers or the skeptics is more correct.

The table is: Electoral System Mean Turnout Standard Error PR 69.5 1.9 Non-PR 61.2 1.7