Scatterplots and associations

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables where each point represents an observation. It helps to visualize the relationship between the variables.

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 a scatterplot?

Back

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

Front

What are the common types of associations observed in scatterplots?

Back

The common types of associations are positive, negative, and no association.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to identify relationships, trends, and patterns between two quantitative variables.

Front

What type of variables are typically represented in a scatterplot?

Back

Scatterplots typically represent two quantitative variables.

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 points cluster around a line or curve; tighter clusters indicate stronger associations.

Front

What is an example of variables that would likely show a positive association?

Back

An example would be years of education and annual income, where more education typically leads to higher income.

Front

What is an example of variables that would likely show a negative association?

Back

An example would be the number of hours spent watching TV and academic performance, where more TV time may correlate with lower performance.