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Enter a mean and standard deviation, then press Calculate.
From the book, Chapter 7. Convert to a z-score, then find the area. Mina’s milk (mean 250 ml, SD 4 ml): 0.6% of cups are under 240 ml; to have only 0.1% under, set the machine to 252.4 ml. Bell-curve answers only hold for data that really are bell-shaped; times, prices and incomes usually are not.
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