This example illustrates the SURVEYREG procedure to perform a regression in a stratified sample design. Consider a population of 235 farms producing corn in the states of Nebraska and Iowa. You are ...

Suppose that the sample of students described in the previous section was actually selected using stratified random sampling. In stratified sampling, the study population is divided into ...

This is the description of the sample plan for a survey of enrollments by mail questionnaire of 1800 colleges and universities in the United States. The requirements of the survey included speed, ...

They concluded that systematic or stratified random sampling patterns are more effective than simple random sampling for bulk powder testing.

In stratified random sampling, one splits the population into non-overlapping groups (e.g., under 30 years of age, 30 years and over) and then uses systematic or simple random sampling to select ...

The stratified random sample is always at least as accurate on the average as the random sample and its relative efficiency is a monotone increasing function of the size of the sample. No general ...

Systematic sampling involves selecting a random sample from a larger population at a regular interval.