What are sampling methods? In a statistical study, sampling methods refer to how we select members from the population to be in the study. If a sample isn't randomly selected, it will …

Practice identifying which sampling method was used in statistical studies, and why it might make sense to use one sampling method over another.

Every good investigation begins with a good question! Learn how to form questions and gather data to explore those questions. You'll also learn about some investigative techniques, …

Practice identifying which sampling method was used in statistical studies, and why it might make sense to use one sampling method over another.

Statistics is all about forming questions and gathering data to explore those questions. This unit connects these questions to aspects of research design, including sampling and survey …

Learn statistics and probability—everything you'd want to know about descriptive and inferential statistics.

Jillian wants to know what percent of students at her school watch sports on TV. Which strategy for sampling will be more likely to produce a representative sample?

Now we have three methods by which he can do it. Let's just think about whether each of these methods are fair, where each kid does have the same chance of getting chosen.

Identify the advantages and disadvantages of sampling methods, why we might use one sampling method over another, and how to set up a sample so it represents the population.

In stratified sampling, the population is divided into subgroups called strata based on characteristics that they share (e.g., the high school year/class of students are in the …