正态分布曲线下正负1个标准差之间所包含的面积占正态曲线下总面积的比例为
A.0.9974
B.95.00%
C.68.26%
D.31.74%
正确答案是C
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Rearrange the followingsentences so that they read logically. Put the corresponding letters in aproper sequence in the boxes on the answer sheet. The positions of somesentences have been given.
A. They may reject th