They have little basis: The statistics are almost meaningless; averages don't represent correlation and massive aggregate numbers tell us nothing about any member of the population. For example, the average wealth of 999 bankrupt people and Bill Gates is $75 million, a number which tells us nothing about anyone in that group.
I never thought I'd see something like this from the WSJ, or say that one of their stories should be removed from HN, but I flagged this one.
(Admittedly there's a chance of something more substantive beyond the headline and pre-paywall paragraph I can read, but I still can't imagine anything can justify that headline or the inept use of statistics to justify it.)
EDIT: Thanks for the suggestions on the web search (which I should have thought of). It turns up this headline too, in the Daily Caller; great job on spreading this story with your excellent journalism, WSJ:
Foreign Students Five Times As Likely To Cheat In College