Scatterplots and association

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

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 it mean if a scatterplot shows no association?

Back

No association means that there is no discernible pattern or relationship between the two variables.

Front

How can you identify a linear relationship in a scatterplot?

Back

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

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables.

Front

What type of association would you expect between years of education and annual income?

Back

A positive association is expected, as higher education levels often correlate with higher income.

Front

What does it mean if a scatterplot has a cluster of points?

Back

A cluster of points indicates that there is a concentration of data points in that area, suggesting a potential relationship.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are points that fall far from the other data points and can indicate variability in the data or errors in measurement.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.