Reading a chart with an uneven baseline
A cropped axis can turn a small gap between values into a towering gap between bars. The right way to read it depends on the mark, the scale, and the comparison being asked of the reader.
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The missing denominator in a striking statistic
A percentage can be accurate and still leave its central question unanswered. Trial results, road fatalities and graduate admissions show how the population, exposure and time beneath a number change what it means.