Stratified Random Sampling

Simple Random Sampling

1936 Literary Digest Straw Poll

Which of the following provides the best definition of a sampling frame?

When a researcher uses a local hospital's patient admission records to select participants for a clinical study, that comprehensive list serves as the ____.

A researcher is planning several different studies. Match each group of interest with the specific source list that would serve as the most appropriate sampling frame for selecting participants.

A researcher discovers that their sampling frame—a list of residential landline phone numbers—excludes approximately 25% of the local community who only use cell phones. If the researcher increases their random sample size from 400 to 800 people using this same list, they will effectively eliminate the bias introduced by the incomplete list.

A researcher is designing a study to evaluate the job satisfaction of all licensed clinical psychologists currently practicing in a specific state. To ensure the study uses a random selection process where every professional in that group has a chance of being included, the researcher must identify an appropriate sampling frame. Rank the following potential sources from the most representative sampling frame (1) to the least representative sampling frame (4).