Learn how simple random sampling works and what advantages it offers over other methods when selecting a research group from a larger population.

A simple random sample is a subset of a statistical population where each member of the population is equally likely to be chosen.

Selecting a random sample from a set is simple. But what about selecting a fair random sample from a set of unknown or indeterminate size? That’s where reservoir sampling comes in, and [Sam ...

Woolson, Bean, and Rojas (1986, Biometrics 42, 927-932) present a simple approximation of sample size for Cochran's (1954, Biometrics 10, 417-451) test for detecting association between exposure and ...

A newly published study involving researchers from Karolinska Institutet indicates that prostate cancer can be diagnosed at an early stage through a simple urine sample.

However, since the proportion we’re estimating with elusion testing is taken from the full sample set used for validation, it is far easier to calculate an appropriate sample size.

The variables in BATLIM whose values vary with subgroup sample size are assigned the special missing value V. The SHEWHART procedure provides various options for working with unequal subgroup sample ...

The NMARKERS option requests special symbols to identify points for which the subgroup sample size differs from the nominal sample size. Output 43.3.3: Displaying All Subgroups Regardless of Sample ...