求多项式[img=258x27]17de9124b2c58e4.png[/img]中变量[img=11x14]17de5fbe7011053.png[/img]的最高次幂系数应输入 A: poly=(x^2*y+2y)^3+5x^6*y^2+2x^2Coefficient[poly,x^[Exponent[poly,x]]] B: poly=(x^2*y+2y)^3+5x^6*y^2+2x^2Coefficient[poly,x^(Exponent[poly,x])] C: poly=(x^2y+2y)^3+5x^6y^2+2x^2Coefficient[poly,x^[Exponent[poly,x]]] D: poly=(x^2*y+2y)^3+5x^6*y^2+2x^2Exponent[poly,x];Coefficient[poly,%]

2(marks 3). Which of the following is an incorrect statement. A: The product moment correlation coefficient can be used with non-numeric data. B: The product moment correlation coefficient is the definitive measure of correlation. C: The rank correlation coefficient can be used as an approximation to the product moment coefficient. D: The rank correlation coefficient can be used with non-numeric data .

In the calculation equation [img=235x39]1803b953831b0d6.png[/img] of normal section bearing capacity for axial compressed members, the coefficient 0.9 means ( ). A: the partial coefficient B: the reliability adjustment coefficient C: the combination coefficient D: the empirical coefficient

In regression analysis, if the coefficient of determination is 1.0, then the coefficient of correlation must be 1.0.

下面哪个参数是材质的动力学属性？（） A: ABounce Coefficient B: BStatic Friction C: CSliding Friction D: DFriction Coefficient

Given the self impedance at the fault location and the split coefficient of a certain power source to the fault location, the transfer impedance from the power source to the fault location should be ( ). A: self impedance times the split coefficient B: self impedance dividedby the split coefficient C: uncertain

If the coefficient of determination is 0.975, then the slope of the regression line:

The Pearson coefficient of correlation r equals 1 when there is/are no:

Pearson’s product moment correlation coefficient 可用来判断：

总传热系数一般考虑保温层和埋地管的放热系数即可The total heat transfer coefficient generally considers the heat transfer coefficient of the insulation layer and buried pipe