How do we determine our population of interest?

•Administrators can tell us

•We notice anecdotally or through qualitative research that a particular subgroup of students is experiencing higher risk

•We decide to do everyone and go from there

3 factors that influence sample representativeness

•Sampling procedure

•Sample size

•Participation (response)

When might you sample the entire population?

•When your population is very small

•When you have extensive resources

•When you don’t expect a very high response