Two-variable Statistics

Front

What is a regression line?

Back

A regression line is a straight line that best represents the data on a scatter plot, showing the relationship between two variables.

Front

What does the y-intercept represent in a regression equation?

Back

The y-intercept represents the value of y when x is zero, indicating the starting point of the relationship.

Front

What is a positive linear association?

Back

A positive linear association means that as one variable increases, the other variable also increases.

Front

What is a negative linear association?

Back

A negative linear association means that as one variable increases, the other variable decreases.

Front

What does 'no association' mean in statistics?

Back

'No association' means there is no discernible relationship between the two variables being analyzed.

Front

What is a nonlinear association?

Back

A nonlinear association occurs when the relationship between two variables cannot be accurately represented by a straight line.

Front

How do you interpret a scatter plot?

Back

A scatter plot visually represents the relationship between two quantitative variables, showing patterns, trends, and correlations.

Front

What is the purpose of linear regression?

Back

The purpose of linear regression is to model the relationship between two variables and make predictions based on that model.

Front

What does a strong positive correlation indicate?

Back

A strong positive correlation indicates that the two variables move in the same direction with a high degree of consistency.

Front

What does a weak negative correlation indicate?

Back

A weak negative correlation indicates that there is a slight tendency for one variable to decrease as the other increases, but the relationship is not strong.