[问答题]
[单选题]样本容量为30,总离差平方和为500,则估计的标准误差为()。A.1.217B.1.482C.4.152D.5.214
[单选题]A.B.C.D.
[单选题]A.B.C.D.3pV
[单选题]A.1B.-1C.3D.-3
[单选题]A.130.38kPaB.0.767kPaC.7607kPaD.