Summary of key words
Population
=
All
Census
=
A survey of the whole population
Sampling
=
Representation
Bias
=
A systematic error in a survey that can influence and skew the outcome of the data towards a certain direction
Random sampling
=
Equal chance examples include simple random sampling and stratified sampling
Stratified sampling
=
Sample every category
Cluster sampling
=
Everything in a couple of categories (also known as one-stage)
Multi-stage sampling
=
Sampled samples (also known as two-stage)
Leading question
=
A question that guides the respondent to answer in a particular way
Opportunity sampling
=
Immediately available
Voluntary sampling
=
Volunteers give their views
Systematic sampling
=
Select every Kth subject
