A letter submitted to the editor of a national newsmagazine was written and signed by a Dr  Shirley Martin who, in the text of the letter, mentions being a professor at a major North American medical school
Knowing that fewer than 5 percent of the professors at such schools are women, the editor reasons that the chances are better than 19 to 1 that the letter was written by a man
More than 95 percent of the planes built by UBC last year met government standards for large airliners. Since small planes account for just under 5 percent of UBC's output last year, it is almost certain that all their large planes met government standards.