Scatter Plots 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 axis.

Front

What does correlation mean in statistics?

Back

Correlation refers to a statistical measure that describes the extent to which two variables change together.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

Front

What does it mean if there is no correlation?

Back

No correlation means that there is no predictable relationship between the two variables.

Front

How can you identify a positive correlation in a scatter plot?

Back

In a scatter plot, a positive correlation is identified by points that trend upwards from left to right.

Front

How can you identify a negative correlation in a scatter plot?

Back

In a scatter plot, a negative correlation is identified by points that trend downwards from left to right.

Front

What is the purpose of a trend line in a scatter plot?

Back

A trend line is used to summarize the relationship between the variables and to predict future values.

Front

What does the slope of a trend line indicate?

Back

The slope of a trend line indicates the direction and steepness of the relationship between the two variables.

Front

What is an example of a situation with a positive correlation?

Back

As study time increases, exam scores tend to increase.