Correlation Explorer

Move the points and watch the correlation coefficient r respond.

1Start with

2Change the data

Click the plot to add a point. Drag a point, or select it with Tab and use the arrow keys, to move it.Tap the plot to add a point. Drag a point to move it.

3Show

Lines at the means x̄ and ȳ The point that changes r the most Quadrants and the formula for r Each child’s age

Scatterplot

Dr. Barry J. Monk · Coauthor of Elementary Statistics (McGraw-Hill)