Dear Ujm,
Shaddchanim are not statisticians. It is more likely that their statements imply their reverse. Because this may eclipse your fields of self taught expertise, I’ll tell you a story.
A company has a reputation of their employees remaining single. So the CEO hires Zalman as a shadchan for their employees. He makes a list of all eligible employees. He notices that the company has far more single girls than boys. After a year of unsuccessful matchmaking, he starts looking for a cause. He goes through all his ideas that started of promising but did not end with a match. On each one he recalls the underlying reasons that the company employee would not continue. Zalman became convinced that the employees were more attached to the company then their own lives. He decided to talk to the CEO about a coach to for a healthier business setting for their single employees. The CEO calles in Joseph to go over Zalman’s notes. Joseph turned to the CEO and said, “there are far more girls on this list than boys. I know of a company that has many single boys”. The CEO proclaims, “as a business man I always go by the data. The data clearly says there are more girls in my company, so Joseph must be right.”