Design

Question 1

Sampling frame

Answer 1

A list of everyone in the population

Question 2

SRS

Answer 2

equal chance of choosing unit and every set of units

Question 3

Stratified

Answer 3

divide population into strata and take SRS from each strata

Question 4

Systematic

Answer 4

choose every “50th”

Question 5

Cluster

Answer 5

select random location and sample all from selected location

Question 6

Observational study

Answer 6

observe outcomes without giving a treatment

Question 7

Experiment

Answer 7

imposes treatments on subjects (shows cause and effect)

Question 8

Principles of Experimental Design

Answer 8

Control (keep all non-testing variables constant)
Replication (use many subjects)
Randomization (use chance to assign treatments)