The number of Americans considered extremely obese , or at least 100 pounds overweight , has quadrupled since the 1980s to a startling 4 million , the research shows .
The number of extremely obese American adults - those who are at least 100 pounds overweight - has quadrupled since the 1980s to about 4 million .
using statistical tools such as decision trees cluster analysis, and regression analysis, to detect relevant customer purchase patterns between and among variables in a database