设X~N(μ,0.09)从中随机抽取样本量为4的样本,其样本均值为,则总体均值μ

恬恬2019-12-17  3

问题 设X~N(μ,0.09)从中随机抽取样本量为4的样本,其样本均值为,则总体均值μ的0.95的置信区间为()。A.±0.15u0.95 B.±0.15u0.975 C.±0.3u0.95 D.±0.3u0.975

选项

答案B

解析[img]/upload/tiku/216/2646758_1.jpg[/img]
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