未知题型
A、衬托法则B、对角线法则C、填满画面法则D、图样元素法则正确答案:图样元素法则
Weighted least squares estimation is used only whenA.th...
单项选择题Weighted least squares estimation is used only when A. the dependent variable in a regression model is binary B. the independent variables in a regression model are correlated C. the error term in a regression model has a constant variance D. the functional form of the error variances is known
精卵细胞受精后发育为()。
未知题型精卵细胞受精后发育为()。
【单选题】距离等度量映射是在降维时试图保持() A. 相邻样本之间的距...
单项选择题【单选题】距离等度量映射是在降维时试图保持() A. 相邻样本之间的距离 B. 样本之间的距离 C. 样本之间的线性关系 D. 相邻样本之间的线性关系