Sampling Vocab

Census

A survey of the whole population

Judgement Sample

A sample based on the sampler’s judgement and not randomness

Convenience Sample

Samples only those who are convenient to sample, biased

Simple Random Sample

Uses a random number generator

Systematic Sample

Randomly selects one number then every nth person after

Cluster Sample

Randomly selects one item then those around them in a group

Stratified Sample

Sorts people into groups based on characteristics, then selects from each group

Accuracy

Level of bias

Precision

Level of variability

Error

Variability across different samples

Bias

Under or overrepresentation

Pilot Survey

A smaller, test survey done before the real one