> In one year-long intervention that included lean, overweight, and obese workers, the 36 total participants lost an average of 3 to 7 pounds. Now, that's a us

> In one year-long intervention that included lean, overweight, and obese workers, the 36 total participants lost an average of 3 to 7 pounds. Now, that's a useless statement if I've ever seen one. The arithmetic mean is pretty much meaningless if the group varies that much.