发布日期 ： 2019-12-16 06:15:24 UTC
分类 ： Algebraic
Suppose the two populations X and Y are independent of each other and obey the normal distribution. The mean and variance of X areμ<sub>1</sub>,σ<sub>1</sub><sup>2</sup>, the mean and variance of Y areμ<sub>2</sub>,σ<sub>2</sub><sup>2</sup>, that is X~N(μ<sub>1</sub>,σ<sub>1</sub><sup>2</sup>), Y~N (μ<sub>2</sub>,σ<sub>2</sub><sup>2</sup>),this page is the differenceσ<sub>1</sub><sup>2</sup>/σ<sub>2</sub><sup>2</sup> hypothesis testing, the statistics are
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，S<sub>1</sub><sup>2</sup>,S<sub>2</sub><sup>2</sup>For the sample variance of the two sets of samples, their square root is called the sample standard deviation, n<sub>1</sub>, and n<sub>2</sub> is the corresponding sample size. <br >