Quiz · 4 questions
📏 Sigma as a Lens
The first normal-distribution trick: σ as the citizen's measuring stick
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Quiz
01If IQ is normally distributed with mean 100 and standard deviation 15, what z-score does an IQ of 130 correspond to?
02Under normality, about what fraction of values lie within 2σ of the mean?
03A measurement of 'the table is 100cm ± 0.5cm' usually means what, statistically?
04Why does '5-sigma' carry such weight in particle physics?
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