AP Statistics Unit 2 Review

Front

What is the slope of the Least Squares Regression Line (LSRL)?

Back

The slope of the LSRL indicates the change in the response variable for each one-unit increase in the explanatory variable.

Front

What does a weak positive correlation indicate in a graph?

Back

A weak positive correlation indicates that as one variable increases, the other variable tends to also increase, but the relationship is not strong.

Front

What is a conditional distribution?

Back

A conditional distribution shows the distribution of a variable restricted to a certain condition or group.

Front

How do you calculate a residual in statistics?

Back

Residual = Actual y - Predicted y-hat.

Front

What does a strong negative correlation indicate in a graph?

Back

A strong negative correlation indicates that as one variable increases, the other variable tends to decrease significantly.

Front

What is the purpose of the Least Squares Regression Line (LSRL)?

Back

The LSRL minimizes the sum of the squares of the residuals, providing the best fit line for the data.

Front

What is a marginal distribution?

Back

A marginal distribution shows the distribution of a single variable without considering the other variable.

Front

What does it mean if a correlation coefficient is close to 1?

Back

A correlation coefficient close to 1 indicates a strong positive linear relationship between two variables.

Front

What does it mean if a correlation coefficient is close to -1?

Back

A correlation coefficient close to -1 indicates a strong negative linear relationship between two variables.

Front

What is the significance of the y-intercept in a regression equation?

Back

The y-intercept represents the predicted value of the response variable when the explanatory variable is zero.