Representative samples are one type of sampling method. This method uses stratified ... sample, the Census Bureau stratifies the population according to county, living situation, and other ...

Stratified random sampling allows researchers to obtain a sample population that best represents ... and female are clearly defined groups. In other situations, however, it might be far more ...

Consider the example in the section "Stratified Sampling". The study population is a junior high school with a total of 4,000 students in grades 7, 8, and 9. Researchers want to know how much these ...

Stratified sampling is best used when a population is diverse. For example, if a company wanted ... "Monthly Employment Situation Report: Quick Guide to Methods and Measurement Issues." ...

The following PROC SURVEYSELECT statements select a probability sample of customers from the Customers data set according to the stratified sample design. title1 'Customer Satisfaction Survey'; title2 ...

where very high sample numbers—like testing every can produced—would not be meaningfully more powerful. They concluded that systematic or stratified random sampling patterns are more effective ...

where very high sample numbers -- like testing every can produced -- would not be meaningfully more powerful. They concluded that systematic or stratified random sampling patterns are more ...