Debater: The average amount of overtime per month worked by an employee in the manufacturing division of the Haglut Corporation is 14 hours  Most employees of the Haglut Corporation work in the manufacturing division  Furthermore, the average amount of overtime per month worked by any employee in the company generally does not fluctuate much from month to month
Ttherefore, each month, most employees of the Haglut Corporation almost certainly work at least some overtime
It overlooks the possibility that even if, on average, a certain amount of overtime is worked by the members of some group, many members of that group may work no overtime at all.