AP Stats Unit 3 REVIEW - Collecting Data

Front

What is the importance of controlling variables in an experiment?

Back

Controlling variables ensures that the results of an experiment are due to the independent variable and not influenced by other factors, leading to valid conclusions.

Front

What is random sampling with replacement?

Back

A sampling method where each member of the population can be selected more than once, as the selected member is returned to the population before the next selection.

Front

Define random sampling.

Back

A sampling method where every member of the target population has an equal chance of being selected for the sample.

Front

What is a confounding variable?

Back

A confounding variable is an outside influence that changes the effect of a dependent and independent variable, potentially skewing the results of an experiment.

Front

What does it mean to generalize results from a sample?

Back

To generalize results means to apply findings from a sample to a larger population, assuming the sample accurately represents that population.

Front

What is the difference between a sample and a population?

Back

A population includes all members of a specified group, while a sample is a subset of the population selected for analysis.

Front

What is the purpose of using a large sample size in surveys?

Back

A large sample size increases the reliability of the results and reduces the margin of error, making the findings more representative of the population.

Front

What is self-selected sampling?

Back

A sampling method where participants volunteer to be part of the study, which may introduce bias as those who choose to participate may have different characteristics.

Front

What is the role of the independent variable in an experiment?

Back

The independent variable is the factor that is manipulated or changed in an experiment to observe its effect on the dependent variable.

Front

What is the dependent variable in an experiment?

Back

The dependent variable is the outcome or response that is measured in an experiment, which is affected by changes in the independent variable.