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题目内容
(广州大学-统计学原理)
抽取一个容量为100的随机样本,其均值为,标准差为s=10,则总体均值的95%的置信区间为( )
A. (39.80,40.20) B. (38.04,41.96)
C. (38.35,41.65) D. (31.00,50.00)
A. (39.80,40.20) B. (38.04,41.96)
C. (38.35,41.65) D. (31.00,50.00)
参考答案