设总体X服从正态分布 现有7个样本：-16.0329 -70.2857 8.5146 15.6578 -47.4447 55.4003 55.3232
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设总体X服从正态分布，现有7个样本：-16.0329,-70.2857,8.5146,15.6578,-47.4447,55.4003,55.3232，给出数学期望和标准差的点估计区间估计为：
A．0.1618,48.1239;[-44.3454,44.6690],[31.0107,105.9720]
B．1.1618,48.1239;[-44.3454,44.6690],[31.0107,105.9720]
C．0.1618,48.1239;[-23.3454,23.6690],[31.0107,105.9720]
D．0.1618,67.1239;[-44.3454,44.6690],[28.0107,125.9720]
回答
共1条回复-
0.1618,48.1239;[-44.3454,44.6690],[31.0107,105.9720]