AP Stats Unit 1 Practice Test

Front

What are the elements of a good experimental design?

Back

Key elements include: a control treatment, random sampling, multiple treatments, and replication.

Front

What is a Cluster Random Sample?

Back

A sampling method where entire groups (clusters) are randomly selected, and all individuals within those groups are surveyed.

Front

What does a back-to-back stem-and-leaf plot represent?

Back

It displays the distribution of two related sets of data, allowing for comparison of their shapes and medians.

Front

What is the main difference between an experiment and an observational study?

Back

Experiments allow for cause-and-effect relationships to be inferred, while observational studies do not.

Front

Define Convenience Sampling.

Back

A non-probability sampling method where subjects are selected based on their easy availability.

Front

What is a Simple Random Sample?

Back

A sampling method where every individual has an equal chance of being selected.

Front

What is the purpose of a control treatment in an experiment?

Back

To provide a baseline for comparison against the treatment group.

Front

What is a confounding variable?

Back

A variable that influences both the dependent and independent variable, potentially skewing results.

Front

What does it mean to infer a cause-and-effect relationship?

Back

To conclude that one event (the cause) directly affects another event (the effect).

Front

What is the median in a data set?

Back

The middle value when the data set is ordered from least to greatest.