I am a physical scientist. When I look at a scatter plot like the one that you made for temperature anomaly versus El Nino, I see a poor correlation (perfect correlation, 100% likelihood, would be a line) but admittedly one with a positive slope if one exists. I was interested in your method of analysis that reveals a stronger correlation. How did you determine where to draw the lines you used to separate the data into high, medium and low?

CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.