Open the following URL: http://www.shodor.com/interactivate/activities/Regression/

We want to explore the relationship between IQ and SAT scores in a group of college students. Copy the data below into the box below the graph on the website, and click Update Plot. Check Display Line of Best Fit.

130, 1500

87, 1070

123, 1450

96, 1280

110, 1000

1.What is the correlation coefficient (r), its strength, and its direction?

r=0.711; strong positive linear

2. What does this say about the relationship between IQ and SAT scores? Mention strength and direction in answer.

3. What is the regression equation (y = mx + b)?

y=8.801x+298.959

4. What SAT score can we predict from someone who has a IQ of 100? Answer in a full APA sentence mentioning variables of interest.

5. Are we within the restricted range of the data we tested?