Simpson’s paradox, or the Yule–Simpson effect, is a paradox in probability and statistics, in which a trend that appears in different groups of data but disappears or reverses when these groups are combined.
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Logistic Regression Fundamentals
How to Lie with Data Visualization
In a post on Heap data blog, Ravi Parikh (@ravisparikh) explains several ways of misleading the audience with data visualization:
What Does Your Credit-Card Company Know About You?
In a New York Times article, Charles Duhigg (@cduhigg) explains what credit card companies know about their customers by collecting enormous amounts of data and drawing psychological and behavioural lessons from them.