Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
A systematic sample is a type of sampling method where elements are selected from an ordered sampling frame at regular intervals. It involves choosing a starting point and then selecting every nth element in the population.
5 Must Know Facts For Your Next Test
Requires a list of the population in a specific order.
The interval (n) is calculated by dividing the population size by the desired sample size.
Can introduce bias if there is a hidden pattern in the ordering of the population list.
Simpler to implement compared to simple random sampling when dealing with large populations.
Every member of the population has an equal chance of being selected once the starting point and interval are determined.
A sampling method where each member of the population has an equal chance of being selected, typically using random number generators or drawing lots.
Stratified Sample: A method that divides the population into distinct subgroups (strata) and then takes a proportional sample from each subgroup.
Cluster Sample: A technique where the entire population is divided into clusters, usually based on geography, and entire clusters are randomly selected.