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Title: couldn't get past the blunders on the 2nd formula
Review: OK, so I am a quant and I thought a simple guide could show me "the ropes". But when a "Course" gets the definition of standard deviation WRONG on page 12 (it's missing the square root, and doesn't define rbar as the average return), I must simply give up. Wiley? Hello?! Anybody proofreading these??
