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- 2011-7-11
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- 2016-4-19
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Interesting way of looking at the problem using Chebyshev's inequality. Here is the answer explanation as per CFAI.
"Given that the sales are normally distributed, the mean is centered in the interval.
Mean = (230+480)/2 = 355. 99% of observations under a normal distribution will be +/- 3 std devs. Thus (355-230)/3 = 41,667. It is also the case that (480-355)/3 = 41,667." |
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发表于 2011-7-11 18:38
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