Representative vs. Random Samples: Key Differences Explained

Learn how representative samples and random samples differ and why combining them minimizes sampling bias for accurate data.
JSTOR Daily

On Estimating the Variance in Sampling with Probability Proportional to Aggregate Size

The problem of estimating the variance of the ratio estimator in sampling with probability proportional to aggregate size is investigated. The form of nonnegative unbiased variance estimators is found ...
JSTOR Daily

Variance Estimation for the Regression Estimator in Two-Phase Sampling

Many techniques in survey sampling depend on the possession of information about an auxiliary variable x, or a vector of auxiliary variables, available for the entire population. Regression estimates ...
Pew Research Center

3. Variability of survey estimates

While previous sections of this report have focused on the kinds of systematic biases that may be the largest worry when it comes to public opinion polls, the variance (or precision) of estimates is ...
National Academies of Sciences%2c Engineering%2c and Medicine

Reengineering the Census Bureau's Annual Economic Surveys

Suggested Citation: "5 Sampling and Estimation." National Academies of Sciences, Engineering, and Medicine. 2018. Reengineering the Census Bureau's Annual Economic Surveys. Washington, DC: The ...
Investopedia

Systematic Sampling: What Is It, and How Is It Used in Research?

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...