AP Stats Unit 3

Front

What is the importance of random selection in experiments?

Back

Random selection helps ensure that the sample is representative of the population, reducing bias and allowing for generalization of results.

Front

What is a convenience sample?

Back

A convenience sample is a non-probability sampling method where participants are selected based on their easy availability and proximity to the researcher.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.

Front

What are lurking variables?

Back

Lurking variables are hidden variables that can influence the outcome of an experiment, potentially confounding the results.

Front

What is the purpose of randomization in experiments?

Back

Randomization helps eliminate bias by ensuring that each participant has an equal chance of being assigned to any treatment group.

Front

What is a treatment group in an experiment?

Back

A treatment group is a group of subjects that receives the treatment or intervention being tested.

Front

What is the significance of a large sample size in experiments?

Back

A large sample size increases the reliability of the results and helps control for variability, making it easier to detect true effects.

Front

What does it mean for an effect to precede a cause in time?

Back

It means that the effect occurs after the cause, which is a necessary condition for establishing causation.

Front

What is stratified sampling?

Back

Stratified sampling is a method of sampling that involves dividing the population into subgroups (strata) and taking a sample from each stratum.

Front

What is the role of control in experimental design?

Back

Control involves keeping all other variables constant except for the independent variable to isolate its effect on the dependent variable.