Learn the distinctions between simple and stratified random sampling. Understand how researchers use these methods to accurately represent data populations.

Survey researchers increasingly recognize that a single survey of the general public can rarely represent the views of small groups of Americans. Such surveys frequently have too few interviews with ...

This section will provide the Case Western Reserve University investigators information on the processes and procedures for transferring and sharing data. It is quite common for a research, service, ...

Background Data-sharing mandates from funders and journals have increased in recent years, but little is known about how shared data are used. Existing research has focused on access frameworks, with ...