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①7,34,61,88,115,142,169,223,250;
②5,9,100,107,111,121,180,195,200,265;
③11,38,65,92,119,146,173,200,227,254;
④30,57,84,111,138,165,192,219,246,270.
关于上述样本的下列结论中,正确的是( )
①7,9,100,107,111,121,180,197,200,265;
②6,33,60,87,114,141,168,195,222,249;
③30,57,84,111,138,165,192,219,246,270.
④12,39,66,93,120,147,174,201,228,255;
关于上述样本的下列结论中,正确的是( )
①7,34,61,88,115,142,169,196,223,250;
②5,9,100,107,111,121,180,195,200,265;
③11,38,65,92,119,146,173,200,227,254;
④30,57,84,111,138,165,192,219,246,270.
关于上述样本的下列结论中,正确的是( )
A.②③都不能为系统抽样 B.②④都不能为分层抽样
C.①④都可能为系统抽样 D.①③都可能为分层抽样
查看习题详情和答案>>①7,34,61,88,115,142,169,196,223,250;
②5,9,100,107,111,121,180,195,200,265;
③11,38,65,92,119,146,173,200,227,254;
④30,57,84,111,138,165,192,219,246,270;
关于上述样本的下列结论中,正确的是( )
A.②③都不能为系统抽样 B.②④都不能为分层抽样
C.①④都可能为系统抽样 D.①③都可能为分层抽样
查看习题详情和答案>>①7,34,61,88,115,142,169,196,223,250;
②5,9,100,107,111,121,180,195,200,265;
③11,38,65,92,119,146,173,200,227,254;
④30,57,84,111,138,165,192,219,246,270.
关于上述样本的下列结论中,正确的是( )
A.②③都不能为系统抽样 B.②④都不能为分层抽样
C.①④都可能为系统抽样 D.①③都可能为分层抽样
查看习题详情和答案>>