Calculate, with technology, the correlation coefficient for a data set. Explain why correlation does not determine causation.
Below is a scatterplot comparing the number of hours of video games played over the course of a month and the score on the unit test.
Use the Desmos activity shown below to answer the question:
Desmos, Andrew Knauft, “Correlation and Regression.”
How does the correlation coefficient help us to quantify the strength of correlation between two variables?
Identify the calculation coefficient, and describe what this means in terms of how the variables are related.
The following resources include problems and activities aligned to the objective of the lesson that can be used to create your own problem set.
The scatterplot below displays data on the number of defects per cars and a measure of customer satisfaction (on a scale from to , with higher scores indicating greater satisfaction) for the brands of cars sold in the United States in 2009.
Data Source: USA Today, June 16, 2010, and July 17, 2010
r = -0.95
r = -0.24
r = 0.83
r = 1.00