发布日期 ： 2021-01-28 01:35:42 UTC
分类 ： Classic physics
It is known that the overall <i>X</i> obeys a normal distribution with a mean of μ, a standard deviation of σ, and a variance of σ<sup>2</sup>, ie <i>X</i>~<i> N</i>(μ,σ<sup>2</sup>), This page deals with the case where the variance or standard deviation is known to make a hypothesis test on the mean. The test statistic is
<img alt="" src="http://drr.ikcest.org/static/upload/87/874dee50-eb47-11e9-af50-00163e0618d6_m.jpg" style="width: 100px; vertical-align: middle;" >。