题目内容
(请给出正确答案)
[主观题]
-2/5,3/7,-4/9,5/11,(),1/2A.6/11B.-7/11C.-6/13D.-7/13
-2/5,3/7,-4/9,5/11,(),1/2
A.6/11
B.-7/11
C.-6/13
D.-7/13
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-2/5,3/7,-4/9,5/11,(),1/2
A.6/11
B.-7/11
C.-6/13
D.-7/13
设有如下数据
xi | 1 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
fi | 2 | 7 | 8 | 10 | 11 | 11 | 10 | 9 | 8 |
利用最小二乘法求该组数据的多项式拟合曲线。
2/3 4/7 6/11 8/15 ()
A.1/2
B.10/19
C.11/19
D.11/23
3, 2, 5, 4, 7, 8, 9, 16, 11 ()
A.12
B.32
C.40
D.10
下列两变量为非正态,选用恰当的方法计算相关。
被试 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
X Y | 13 14 | 12 11 | 10 11 | 10 11 | 8 7 | 6 7 | 6 5 | 5 4 | 5 4 | 2 4 |
A.(2)(1)(6)(8)(5)(7)(12)(4)(11)(18)
B.(1)(2)(6)(8)(5)(7)(12)(4)(11)(18)
C.(2)(1)(6)(8)(5)(7)(12)(4)(18)(11)
D.(1)(2)(6)(8)(5)(7)(12)(4)(18)(11)