These online exercises involve guessing the productmoment correlation for various scatterplots. This helps to improve intuitive understanding of the correspondence between scatterplots and correlations. To get started, try out Correlation explore and then, when you're ready, try Correlation guess:
 Correlation explore  explore scatterplots with .1 increments
 Correlation guess  guess 30 scatterplots with .1 increments
 > 14 / 30 (outstanding)
 11  14 / 30 (very well done)
 8  10 / 30 (solid effort)
 5  7 / 30 (you're getting there)
 < 5 / 30 (more practice needed)
More


For some similar, alternative exercises try:
 Correlation explore
 Simulate scatterplots for any correlation with sample sizes up to 100
 Guessing correlations
 4 scatterplot matching to correlations multiple choice exercises
 try to average over 75%
 Guess the correlation (requires java)
 single scatterplot, guess exact correlation
 try to get within .1
 Guessing correlations (onlinestatbook.com) (requires java)
 Guess the correlation for each scatterplot from the 5 options, then click new data  after some practice, you should be able to get 100%

