Scatter Plot Terms and Correlation

Front

What is a scatter plot?

Back

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

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

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

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure that describes the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does it mean if a scatter plot has no association?

Back

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

Front

What is a trend line in a scatter plot?

Back

A trend line is a straight line that best represents the data points in a scatter plot, showing the general direction of the relationship.

Front

How can you use a trend line to make predictions?

Back

You can extend the trend line to estimate the value of one variable based on the value of the other variable.

Front

What is an example of a negative linear association?

Back

An example is the relationship between the age of a car and its value; as the car gets older, its value typically decreases.

Front

What is an example of a positive linear association?

Back

An example is the relationship between the number of hours studied and test scores; as study hours increase, test scores tend to increase.

Front

What does it mean if a scatter plot shows a nonlinear association?

Back

It means the relationship between the two variables does not follow a straight line; it may curve or change direction.