Vocabulary
The entire group of individuals we want information about.
What is Population?
A "dummy" treatment that appears to be the same as the actual treatment.
What is a Placebo?
Studying a part to gain information about the whole.
What is Sampling?
When participants cannot be contacted or refuse to participate.
What is Non-response Bias?
Easy to reach members of the population.
What is a Convenience Sample?
In a(n) ______, researchers impose a treatment on subjects to study their responses.
What is an Experiment?
Unconscious or automatic attitudes/associations towards someone or something.
What is Hidden Bias?
When members of the population volunteer to be in the sample.
What is a Self-selected Sample?
Over or under representation of people in the sample.
What is Coverage Bias?
When researchers use questionnaires or interviews to collect information from a sample to learn about the entire population.
What is a Sample Survey?
A phenomenon that systematically favors certain outcomes in a study.
What is Bias?
The group we examine to gather information about the population.
What is the Sample?
A principle of experimental design where you want to make the treatment groups as even and comparable as possible before treatments are applied.
What is Randomization?
A baseline group for comparison in an experiment.
What is a Control?
When subjects respond favorably to a placebo as if it were the actual treatment.
What is the Placebo Effect?
Using enough experimental units/subjects in an experiment is called _____.
What is Replication?
Multiple variables whose effects cannot be distinguished from each other.
What are Confounding Variable?
A sampling method that allows every member of a population to have an equal chance of being selected.
What is a Simple Random Sample?
A principle of experimental design where you want to measure differences between two treatments.
What is Comparison?
A sampling method that uses a rule to select the sample. (ex. Every 5th customer)
What is Systematic Sampling?
A value that describes a sample.
What is a Statistic?
A sampling method that divides the population into random groups and selects an SRS of groups.
What is a Cluster Sample?
A combination of stratified and luster sampling usually used with larger populations.
What is a Multistage Sample?
A sampling method that divides the population in homogenous groups and takes an SRS from each group.
What is a Stratified Sample?
A value that describes a population (not a sample).
What is a Parameter?