Back in 1985, Casio brought the first graphing calculator, the fx-7000G, to market. A short couple years later, I started college headed towards an engineering degree, and picked one up. Best ...

In a transformation model h(Y) = X'β + ε for some smooth and usually monotone function h, we are often interested in the direction of β without knowing the exact form of h. We consider a projection of ...

Troy Segal is an editor and writer. She has 20+ years of experience covering personal finance, wealth management, and business news. Catherine Falls Commercial/Getty Images Linear regression is a type ...