A control chart consists of several parts. It has two control limits and an average line. The bottom dashed line is called the lower control limit (LCL). The solid middle line is the average of the ...

A lot of people think the U.S. middle class is shrinking. But as of 2022, a good 52% of Americans lived in a middle-class household, says Pew Research Center. Meanwhile, 28% of Americans are part of ...

Wondering where you land on the economic spectrum? It can be tricky to pin down whether you consider yourself middle class, ...

Lower class, middle class, and upper class are all widely used, but rarely defined terms. For some people, lower class means living in poverty, upper class means a life of luxury, and middle class is ...

Ever wonder where your income puts you compared to the rest of the country? I do. Not in a comparison-obsessed way, but more like a quick "Am I doing OK?" check-in kind of thing. The U.S. Census ...