Scatter Plots, Correlation, and Residuals

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 are the types of correlation?

Back

Positive correlation, Negative correlation, and No correlation.

Front

What is a positive correlation?

Back

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

Front

What is a negative correlation?

Back

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

Front

What does 'no correlation' mean?

Back

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

Front

What is a residual in statistics?

Back

A residual is the difference between the observed value and the predicted value in a regression analysis.

Front

How do you interpret a scatter plot?

Back

To interpret a scatter plot, look for patterns, trends, and the direction of the relationship between the variables.

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, showing the trend of the data.

Front

What does a correlation coefficient indicate?

Back

A correlation coefficient indicates the strength and direction of a linear relationship between two variables.