dummy index 中文意思是什麼
dummy index
解釋
虛指標-
Since a dummy index just indicates summation, it is immaterial which symbol is used.
由於啞指標只是表明求和,所以它使用什麼符號是無關重要的。 -
And also expounding that the first - fight - time can give explanation to the advanced techniques, the estimating ranges of first - fight - time in alcc estimating are expanded. the type - changed index and type - difference are selected as dummy variables. it has discussed mearsursion of type - changed index, and three criterions and three methods to set models including the dummy variable are got
說明性變量選取:說明性變量的選取基於費用因子分析,特別討論了首飛時間對費用預測的影響,論述了首飛時間能對技術先進性作出說明,拓寬其在費用預測中的作用,選取改型指數虛設變量,研究了改型的量化方法,提出了判別準則和實現方法。
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