... 离差积和 deviation product sum 离差量 amount of deviation 离差稳定变换 dispersion stabilizing transformation ...
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The most efficient investments are those such that no other investment has a higher return for the same amount of standard deviation.
FORBES: The Efficient Frontier
The 20% rate thus is defined as a deviation, an "expenditure" in the amount of up to 19.6%.
WSJ: Best of the Web Today: Give Us a Break
The standard deviation formula goes like this: 1.1 x the amount bet x the square root of the number of hands played.
FORBES: High Frequency Trading And Blackjack
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