sampling bias
Unrepresentative data collection
Sampling bias is the distortion that occurs when a sample doesn't accurately represent the population being studied.
If you survey only people who answer their phones at 2 PM, you'll miss those who work daytime hours.
Selection methods that systematically exclude certain groups produce skewed results: The poll suffered from sampling bias because it only reached online respondents.
- underrepresentationInsufficient proportional presence
- cherry-pickingChoosing only supporting examples
- stacked deckPre-arranged cards for cheating
- self-selectionChoosing one's own inclusion
- margin of errorAllowable deviation from truth
survey design · loaded question · unrepresentative · outliers · tip of the iceberg · polling · population · blind spot · distortion · generalization · nonresponse · data · recruitment · demographics · flawed · ascertainment · methodology · survey
sampling biasrandom sampling
Selecting by pure chance
representativeness · proportional representation · generalizability
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