Suppose that the sample of students described in the previous section was actually selected using stratified random sampling.

However, there was a point of diminishing returns, where very high sample numbers—like testing every can produced—would not be meaningfully more powerful. They concluded that systematic or stratified ...

Suppose that the previous student sample is actually drawn from a stratified sampling. The strata are grades in the junior high ...

This work considers estimation of dichotomous characteristics of rare populations by sample survey. In particular, we investigate ...

Producers of infant formula employ comprehensive food safety systems, including product testing to ensure those systems are working.

Early survey statisticians faced a puzzling choice between randomized sampling and purposive selection but, by the early 1950s ...