以下哪组原假设不能采用F检验：
A: β2 = 1 且β3= β4/β5.
B: β2 =0.
C: β1 + β2 = 1 且β3 = -2β4.
D: β0 = β1且β1 = 0.
A: β2 = 1 且β3= β4/β5.
B: β2 =0.
C: β1 + β2 = 1 且β3 = -2β4.
D: β0 = β1且β1 = 0.
举一反三
- 下面哪一项的系数约束不能用F检验来进行假设检验： A: β2 = 1 且β3= β4/β5 B: β2 =0 C: β1 + β2 = 1 且β3 = -2β4 D: β0 = β1且β1 = 0
- 【单选题】如图示代码,下面哪个是正确的输出结果 A. 0 1 2 3 4 5 B. 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 C. 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 D. 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5
- 【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]
- 以下对二维数组a初始化正确的语句是_。 A: int a[2][ ]={{0 , 1 , 2}, {3 , 4 , 5}}; B: int a[ ][3]={{0, 1, 2}, {3, 4, 5}}; C: int a[2][4]={{0, 1 , 2}, {3 , 4}, {5}} D: int a[ ][3]={{0, 1, 2}, { }, {3, 4}};
- range(5)表示的范围是_________。 A: [0, 1, 2, 3] B: [1, 2, 3, 4] C: [0, 1, 2, 3, 4] D: [1, 2, 3, 4, 5]