Conducting Surveys Flashcards
Household bias
When members of large households are underrepresented
Most data collection involves….
Observational studies, NOT experiments
Nonresponse bias
It is often unclear which part of the population is responding
Quota sampling bias
Attempting to gain a certain percentage of a particular group in the population
Response bias
When the question itself leads to misleading results
Selection bias
Only surveying certain people (ex. Those with cars)
Size bias
Ex. Throwing darts at a map to decide which states to sample would bias in favor of geographically large states
Under coverage bias
When there is an inadequate representation
Ex. Convenience samples
Voluntary response bias
Give too much emphasis to people with sample opinions
Wording bias
Nonneutral or poorly worded questions may lead to answers that are very unrepresentative of the population
Systemic sampling involves…
Listing the population in some order, choosing a random point to start, and the picking every k-th person
Stratified sample
Population is divided into homogeneous groups called strata
All individuals in a given strata have a characteristic in common
Cluster sampling
Population is divided into heterogenous groups called clusters
Each cluster should resemble the entire population
Multistage sampling
Involving two or more steps, each of which could involve any of the various sampling techniques
