Unit 3 Review (LOBF, Residuals, Correlations)

Front

What is a correlation coefficient?

Back

A correlation coefficient (r) is a statistical measure that describes the strength and direction of a relationship between two variables. It ranges from -1 to 1.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, used to make predictions.

Front

How do you calculate a residual?

Back

A residual is calculated by subtracting the predicted value from the actual value (Residual = Actual - Predicted).

Front

What does it mean if the residual is positive?

Back

If the residual is positive, it means the actual value is greater than the predicted value.

Front

What does it mean if the residual is negative?

Back

If the residual is negative, it means the actual value is less than the predicted value.

Front

What is the purpose of a scatter plot?

Back

A scatter plot is used to visually display the relationship between two quantitative variables.

Front

What does it mean if the points on a scatter plot are tightly clustered around the line of best fit?

Back

If the points are tightly clustered around the line of best fit, it indicates a strong correlation between the variables.

Front

What is the range of values for the correlation coefficient?

Back

The correlation coefficient ranges from -1 to 1.