One shoe has a thicker sole than that of the other.
A. [A] Right.
B. [B] Wrong.
C. [C] Doesn' t say.
查看答案
欲比较某药三个不同剂量水平对某病的疗效，宜选用的假设检验方法是
A. 四格表资料的X2检验
B. 成组资料的t检验
C. 行X列表资料的X2检验
D. 秩和检验
E. 方差分析
The suggestion ______ all right.
A. [A] has sounded
B. [B] is sounded
C. [C] sounds
The son knew that his father had put on the wrong shoes.
A. [A] Right.
B. [B] Wrong.
C. [C] Doesn' t say.
在同一总体中抽样，随着样本含量n的增大
A. 样本率也增大
B. 样本率缩小
C. 率的标准误σp也增大
D. 率的标准误口σp缩小 率的标准误口σp不变
微信支付 
支付宝支付