Types of Sampling

The entire collection of items or subjects that are the focus of the study

• Sample

• Population

• Census

• Sample Size

Researcher Selects participants based on easy accessibility

• Cluster Sample

• Sample Survey

• Convenience Sample

• Stratified Random Sample

Equal to the number of observations that we are analzying

• Sample

• Population

• Sample Size

• Voluntary Response Sample

Researcher chooses the sample from the entire populaton through a randomization technique, such as drawing names from a hat.

• Convenience Sample

• Voluntary Response Sample

• Simple Random Sample

• Stratified Random Sample

Researcher Separates the population into a number of statistical populations and then takes a random sample within each population

• Stratified Random Sample

• Cluster Sample

• Voluntary Response Sample

• Sample Size

Researcher separates the population into evenly sized groups, randomly selects one participant in the first group and then every nth participant

• Stratified Random Sample

• Simple Random Sample

• Systematic Random sample

• Convenience Sample

A survey that is carried out using a sample of people who are intended to represent a larger population.

• Population Survey

• Sample Survey

• Survey

• Census

Measured result in an experimental study

• Treatment

• control group

• variable of interest

• experimental study

Something that researchers administer to participants in an experimental study.

• Placebo Effect

• Variable of Interest

• Treatment

• Experimental Study

Research in which data is collected, by observation or survey about some characteristic of the population

• Treatment Study

• Placebo Study

• Observational study

• experimental Study