- A sample that is selected by first dividing the population into non-overlapping groups called
strata and then taking a simple random sample within each stratum.
- Dividing the population into strata should be based on some criterion so that units
are similar within a stratum, but are different between strata.
Dr. Christina Hayes
Wilson 2-263
Department of Mathematical Sciences
Montana State University
Bozeman, MT 59717
phone: 406-994-6557
fax: 406-994-1789
christina.hayes@montana.edu
(Email will likely reach me faster than a phone call)