Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does a positive linear association in a scatterplot indicate?

Back

A positive linear association indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative linear association in a scatterplot indicate?

Back

A negative linear association indicates that as one variable increases, the other variable tends to decrease.

Front

What is a nonlinear association in a scatterplot?

Back

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

Front

What does 'no association' mean in the context of a scatterplot?

Back

'No association' means that there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

How can you identify a linear relationship in a scatterplot?

Back

A linear relationship can be identified if the points in the scatterplot form a pattern that resembles a straight line.

Front

What is correlation in the context of scatterplots?

Back

Correlation measures the strength and direction of a linear relationship between two variables.

Front

What is the range of correlation coefficients?

Back

The range of correlation coefficients is from -1 to 1, where -1 indicates a perfect negative correlation, 1 indicates a perfect positive correlation, and 0 indicates no correlation.

Front

What does a correlation coefficient of 0.8 indicate?

Back

A correlation coefficient of 0.8 indicates a strong positive correlation between the two variables.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables and to identify trends, patterns, or outliers.