Quiz · 5 questions
📏 A Percentile Travels With Its Window
The ruler is part of the measurement, and this app's rulers are wildly unequal
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Quiz
01Why does every read-model row carry first_date and window_years alongside its percentile?
02The percentile function returns None rather than a number when a series has too few points. Why is None better than computing one anyway?
03For a series too young to have its own percentile, the code scores it against a documented reference scale and marks the result with a reference flag. Why does that flag matter?
04Why are the reference scales expressed as plain linear low-to-high maps rather than as small functions?
05What three honesty fields does the composite return alongside its headline number?
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