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Survey research and design in psychology/Tutorials/Correlation/Scatterplot correlation guess

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Scatterplot correlation guess
View the accompanying screencast: [1]
Get to know the direction and size of different correlational values.

These online exercises involve guessing the product-moment 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:

  1. Correlation explore - explore scatterplots with .1 increments
  2. 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:

  1. Correlation explore
    • Simulate scatterplots for any correlation with sample sizes up to 100
  2. Guessing correlations
    • 4 scatterplot matching to correlations multiple choice exercises
    • try to average over 75%
  3. Guess the correlation (requires java)
    • single scatterplot, guess exact correlation
    • try to get within .1
  4. 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%

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