Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...

What is the difference between representative samples and random samples, and how are they are used to reduce sampling bias?

Stratified Random Sampling – If you suspect there are unique differences between items in your population, you might use this sampling strategy to ensure you get a balanced representation of the ...

In a simple random sample, each individual in the population has an equal probability of being chosen. Additionally, each sample of size n has an equal probability of being the chosen sample. This ...

Simple random sampling is the foundation for almost every method taught in introductory statistics classes. Many students, however, have difficulty understanding the difference between simple random ...