This is a preview. Log in through your library . Abstract Estimating the residual variance is an important question in nonparametric regression. Among the existing estimators, the optimal ...

Double sampling of a finite population occurs when a sample from the population is itself sampled, with the intent of measuring variates in the subsample not already available in the sample. An ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...