AP Stats Unit 3

Front

What is the sample size in a survey?

Back

The sample size is the number of individuals or observations included in the survey. In the Consumer Expenditure Survey, the sample size is the 200,000 households that returned their results.

Front

What is randomization in experimental design?

Back

Randomization is the process of randomly assigning subjects to different treatment groups to eliminate bias and ensure that each group is comparable.

Front

What are lurking variables?

Back

Lurking variables are variables that are not included in the study but can affect the results, potentially leading to incorrect conclusions.

Front

What is the purpose of controlling variables in an experiment?

Back

Controlling variables helps to isolate the effect of the independent variable on the dependent variable, ensuring that the results are due to the treatment and not other factors.

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 in an experiment.

Front

What is a control group?

Back

A control group is a group of subjects that does not receive the treatment and is used as a benchmark to measure the effects of the treatment.

Front

What does it mean if results are statistically significant?

Back

Statistical significance indicates that the results observed in an experiment are unlikely to have occurred by chance, suggesting a real effect of the treatment.

Front

What is the difference between qualitative and quantitative data?

Back

Qualitative data describes characteristics or qualities (e.g., colors, names), while quantitative data consists of numerical values that can be measured (e.g., height, weight).

Front

What is the importance of sample size in statistical studies?

Back

A larger sample size generally leads to more reliable results and reduces the margin of error, making the findings more generalizable to the population.

Front

What is a hypothesis in the context of an experiment?

Back

A hypothesis is a testable statement or prediction about the relationship between two or more variables.