单项选择题
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……
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.1.1618,48.1239;[-44.3454,44.6690],[31.0107,105.9720]
B.0.1618,48.1239;[-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]