Unit 8: Scatterplots and Associations

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive association in a scatterplot indicate?

Back

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

Front

What does a negative association in a scatterplot indicate?

Back

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

Front

What does 'no association' mean in the context of scatterplots?

Back

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

Front

What is a linear relationship in a scatterplot?

Back

A linear relationship is when the data points can be approximated by a straight line.

Front

What is a non-linear relationship in a scatterplot?

Back

A non-linear relationship is when the data points do not follow a straight line and may curve or cluster in a different pattern.

Front

How can you determine the strength of an association in a scatterplot?

Back

The strength of an association can be determined by how closely the data points cluster around a line; tighter clusters indicate a stronger association.

Front

What is the purpose of using scatterplots in data analysis?

Back

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

Front

What does it mean if a scatterplot shows a linear and positive association?

Back

It means that as one variable increases, the other variable also increases in a consistent manner, forming a straight line.

Front

What is the significance of the slope in a linear scatterplot?

Back

The slope indicates the rate of change between the two variables; a positive slope means an increase, while a negative slope means a decrease.