bias
Participants choose not to respond to survey
non-response bias
a subsection or subset of a population
sample
a study in which participants are just watched and not controlled, can be prospective and retrospective
observational study
an entire group of people with a a certain characteristic
population
participants choose to respond to a survey
voluntary bias
the result of an experiment
response variable
a study in which participants are randomly assigned and receive a treatment
experimental study
a specific thing that is applied or taken away from the participants
treatment
Not all of the population is represented in the study
under-coverage bias
the change that is being made in an experiment, influences the response variable
explanatory variable
a study in which participants are paired with others either by similarity or by treatment order
matched pair design
the collection of participants to which treatments are applied
experimental units
Participants are chosen to respond based on an easy/quick factor
convenience bias
other factors that might contribute to affecting the response variable
confounding variable
a study in which the experimental units/people do not know which treatment they are receiving
single blind study
a response to a "dummy" treatment
placebo
A flaw in a study (wording, social, etc.) that causes inaccurate data
response Bias
a sample in which participants are randomly selected without any other grouping or categorization
simple random sample
a study in which participants and experimenters are unaware of who is receiving which treatment
double blind study
grouping participants by a certain factor that is expected to affect the response
block design