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解析 (b) To find the z6 term, would need the r3 and 6 term. i.e. 18 - 3r = 3 so, r = 5 (9/5)(x^2)^(9-5)(3/x)^5=30618x^3 " and 18 - 3r = 6 r=4 (9/4)(x^2)^(9-4)(3/x)^4=1026πx^6 = 10206x6 Coefficient of c6 =2(10206)-5(30618)=-132678...
coefficient统计中代表变异系数。在概率论和统计学中，变异系数，又称“离散系数”，是概率分布离散程度的一个归一化量度，其定义为标准差与平均值之比：变异系数只在平均值不为零时有定义，而且一般适用于平均值大于零的情况。变异系数也被称为标准离差率或单位风险。相关统计术语 1、Coefficient of Dete...
智能科学系教材——数据分析基础定义12变异系数（Coefficient of Variation）定义为：CV s ¯x ×100%.(3.4)变异系数是刻画数据相对分散性的度量。定义13偏度（Skewness）定义为：g1 n (n−1)(n−2)s3 n ∑ i=1 (x i−¯x)3= n2u3 (n−1)(n−2)s3 ,(3.5)其中u k 1n n ∑ ...
Coefficient of variation is a measure used to assess the total risk per unit of return of an investment. It is calculated by dividing the standard deviation of an investment by its expected rate of return.Since most investors are risk-averse, they want to minimize their risk per unit of ...
特定X水平的误差,除了应呈随机化的常态分配,其变异量也应相等,称为误差等分散性。 回归方程的测定系数(Coefficient of determination) 回归平方和在总平方和中所占的比率是评价回归效果的一个指标,这个比率越大回归效果越好。公式推导可得,相关系数的平方和等于回归平方和在总平方和中所占的比率。所以 ...
1.This paper presents a theoretical model for the coefficient of restitution calculation of point impact.建立了一种计算点接触正碰撞恢复系数的理论模型。 2.It is shown that the coefficient of restitution affects the inpact velocity of tamper and i.研究表明,恢复系数影响夯锤的冲击速度,冲击速度显著影响...
Find the equation of the sphere if one of its diameters has endpoints (−2,4,3) and (−1,6,6) which has been normalized so that the coefficient of x2 is 1. Equation of sphere A sphere is a three-dimensional...
The coefficient of {eq}x^8 {/eq} in the Taylor series of the function {eq}\displaystyle f (x) = \cos(-2 x^4) {/eq} about the point {eq}a = 0 {/eq} is ___. Mathematical Series: The Maclaurin series or the Taylor series expansion methods ...