Sampling Definitions
Probability Sampling Strategies
Non-Probability Sampling Strategies
Sampling in action
100

A subset of a population used for research

What is a Sample?

100

Sampling Strategy in which observations and participants are a number and a random selection is chosen from the sample

What is Simple Random Sampling?

100

This sampling is a type of non-probability sampling that involves the sample being drawn from that part of the population that is close to hand.

What is Convenience Sampling?

100

This Sampling Method can be used when members of the population are convenient to sample.

What is Convenience Sampling?

200

A group of potential participants used to generalize the results of a research study.

What is a Population?
200

Sampling Strategy in which observations and participants are numbered and a random selection of numbers is chosen.

What is Systematic Sampling?

200

A type of sampling where you take a very tailored sample that’s in proportion to some characteristic or trait of a population.

What is Quota Sampling?

200

This sampling method can be conducted by picking names from a hat.

What is Simple Random Sampling?

300

The strength of which the characteristics of the sample reflect the population.

What is Representativeness? 

300

Sampling Strategy in which the population is divided into groups based on certain characteristics

What is Proportional Stratified Random Sampling?

300

A non-probability sampling technique where existing study subjects recruit future subjects from among their acquaintances

What is Snowball Sampling?

300

This sampling method can be conducted when the population consists of units rather than individuals. 

What is Cluster Sampling?

400

Sampling strategy when only some members have a chance to participate

What is Non Probability?

400

A sampling method in which the size of the sample drawn from a particular stratum is not proportional to the relative size of that stratum.

What is Non-Proportional Stratified Random Sampling?

400

A type of sample used in the process of conducting research including all the people who meet the inclusion criteria and are conveniently available.

What is Consecutive Sampling?

400

This sample is used to ensure a high degree of representativeness of all the strata or layers in the population and ensures cases from small strata are included.

What is Non-Proportional Stratified Random Sampling?

500

Sampling strategy in which every member of the population has a chance of being selected to participate

What is Probability?

500

A sampling strategy in which the researcher creates multiple clusters of people from a population where they are indicative of homogeneous characteristics and have an equal chance of being a part of the sample.

What is Cluster Sampling?

500

This sampling is a form of non-probability sampling in which researchers rely on their own judgment when choosing members of the population to participate in their surveys

What is Purposive Sampling?

500

This sampling is best used when researchers have relatively good knowledge about the population to select the most useful sample members.

What is Purposive Sampling?