## The Annals of Statistics

### Random Designs for Estimating Integrals of Stochastic Processes

#### Abstract

The integral of a second-order stochastic process $Z$ over a $d$-dimensional domain is estimated by a weighted linear combination of observations of $Z$ in a random design. The design sample points are possibly dependent random variables and are independent of the process $Z$, which may be nonstationary. Necessary and sufficient conditions are obtained for the mean squared error of a random design estimator to converge to zero as the sample size increases towards infinity. Simple random, stratified and systematic sampling designs are considered; an optimal simple random design is obtained for fixed sample size; and the mean squared errors of the estimators from these designs are compared. It is shown, for example, that for any simple random design there is always a better stratified design.

#### Article information

Source
Ann. Statist., Volume 10, Number 2 (1982), 526-538.

Dates
First available in Project Euclid: 12 April 2007

https://projecteuclid.org/euclid.aos/1176345793

Digital Object Identifier
doi:10.1214/aos/1176345793

Mathematical Reviews number (MathSciNet)
MR653527

Zentralblatt MATH identifier
0492.62075

JSTOR