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variance
by 趙永祥 2015-11-26 06:50:25, 回應(0), 人氣(715)


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TERM OF THE DAYNOVEMBER 23, 2015
variance
f   t

1. The difference between an expected and actual result, such as between a budget and actual expenditure.
2. Statistics: The arithmetic mean of the squares of the deviations of all values in a set of numbers from their arithmetic mean. Variance and its square root (the standard deviation) are of fundamental importance as ameasure of dispersion. 
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USAGE EXAMPLE
There was a lot of variance in our budget this year, so we will have to cut back on the number of yacht trips that we take.
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