Exam SG1: Analyzing Two-Variable Data & Collecting Data Review

Front

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

Back

A control group is used to provide a baseline for comparing the effects of other treatments.

Front

What is a residual plot?

Back

A residual plot is a scatterplot that displays the residuals on the vertical axis and the explanatory variable on the horizontal axis.

Front

How do you calculate a residual?

Back

Residual = Observed - Predicted

Front

What does 'bias' mean in statistics?

Back

Bias refers to an unfair influence or distortion in data collection or analysis.

Front

True/False: A valid statistical question is based on data that vary.

Back

True

Front

What is the definition of a variable in statistics?

Back

A variable is any characteristic, number, or quantity that can be measured or counted.

Front

What is the difference between qualitative and quantitative data?

Back

Qualitative data describes characteristics or qualities, while quantitative data represents numerical values.

Front

What is an explanatory variable?

Back

An explanatory variable is a variable that is manipulated to observe its effect on a response variable.

Front

What is a response variable?

Back

A response variable is the outcome or effect that is measured in an experiment.

Front

What is the purpose of random sampling?

Back

Random sampling ensures that every individual has an equal chance of being selected, reducing bias.