The babies of the participants will be followed______.
A. throughout their lives
B. for more than two decades
C. from birth to 21 months
D. until they get married
第1题
正态曲线与小于μ+1.96σ的横轴所围的面积是
A.95%
B.97.5%
C.99%
D.68.27%
E.须查表得知
第2题
正态曲线下,小于μ+1.96σ的横轴所围的面积是
A.95%.
B.97.5%.
C.99%.
D.68.27%.
E.需查表得知
第3题
正态曲线与小于(μ+1.96σ)的横轴所围的面积是
A、95%
B、97.5%
C、99%
D、68.27%
E、需查表得知
第6题
正态曲线下,小于μ-1.96σ的横轴所围的面积是
A.2.5%.
B.5.0%.
C.0.5%.
D.0.1%.
E.此界值不常用,需查表得知
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