Question about Standard Deviation : GMAT Quantitative Section
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01 Nov 2010, 21:18
I've seen a lot of references & material covering standard deviation on this forum. However, I don't remember encountering standard deviation at all in the 8 series MGMAT study guides or in any of the problems that I've done in OG12 or OGQR2. Have I just somehow been missing the standard deviation stuff or has it been taken out?
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02 Nov 2010, 06:59
I've seen very few questions about standard deviations through multiple prep books. I believe it's partly due to the fact that they don't expect you to know the standard deviation calculation, but rather the concept of it. I read that somewhere in a Kaplan prep book.
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02 Nov 2010, 23:28
I think there is a couple of questions in the OG about it. The reason is that standard deviation is a notoriously hard number to calculate by hand. The GMAT if it does test you on the concept, will almost never ask you to calculate it, it will more be a test of understanding. (Standard Deviation represents the spread of the distribution around the mean OR a second order measure as we call it)
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