Scatterplots

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 correlation in a scatterplot indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What does a negative correlation in a scatterplot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does 'no correlation' mean in a scatterplot?

Back

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

Front

How can you identify a positive linear association in a scatterplot?

Back

A positive linear association is identified by a pattern where points slope upwards from left to right.

Front

How can you identify a negative linear association in a scatterplot?

Back

A negative linear association is identified by a pattern where points slope downwards from left to right.

Front

What is the purpose of a trend line in a scatterplot?

Back

A trend line helps to summarize the relationship between the variables and can indicate the direction and strength of the correlation.

Front

What does it mean if a scatterplot shows a nonlinear association?

Back

A nonlinear association means that the relationship between the variables does not follow a straight line; it may curve or change direction.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations; they can affect the correlation and interpretation of the data.

Front

How do you interpret the slope of a trend line in a scatterplot?

Back

The slope indicates the rate of change between the two variables; a steeper slope means a stronger relationship.