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When the overall success rate reverses: a practical Simpson's paradox example
Method B performs better on both easy and hard tasks. Can method A still have the higher overall success rate?
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How to read a logarithmic chart: equal distances mean equal ratios
When an axis runs through 1, 10, 100 and 1,000 at equal intervals, those intervals represent equal ratios rather than equal additions.
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Why averaging averages can be wrong: find the denominator first
If two classes average 80 and 60, is their combined average 70?
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