If A gets bigger whenever B gets bigger, did A cause B or did B cause A? This correlation is so often misinterpreted that it probably led to the expression “Lies, damned lies and statistics” Correlation can be positive (both things increase together) or negative (when one goes up, the other goes down) – Typical positive correlation would be an observation that the more laughter in a family, the better the kids do at school. Conclusion – laugh more with your family and that will improve your kids’ marks! An example of negative correlation would be finding that the more…
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