题目内容
(请给出正确答案)
[主观题]
某种物品在处理前与处理后分别抽样分析其含脂率为: ξi(处理前):0.19,0.18,0.21,0.30,0.41,0.12,0.27 ηi(
某种物品在处理前与处理后分别抽样分析其含脂率为:
ξi(处理前):0.19,0.18,0.21,0.30,0.41,0.12,0.27
ηi(处理后):0.15,0.13,0.07,0.24,0.19,0.06,0.08,0.12
假定处理前后的含脂率都服从正态分布,且标准差不变,问处理后含脂率的均值是否显著降低?取显著性水平α=0.05.
提问人:网友anonymity
发布时间:2022-01-06