1. t检验(t-test) 应用场景: t检验用于比较两个样本的均值,判断它们是否显著不同。常见的t检验类型包括单样本t检验、独立样本t检验和配对样本t检验。 单样本t检验:用于比较样本均值与已知总体均值。 示例:检验某班级学生的平均成绩是否与全校平均成绩相同。 独立样本t检验:用于比较两个独立样本的均值。 示例:比较...
卡方检验(Chi-square test) <http://localhost:8888/notebooks/%E5%81%87%E8%AE%BE%E6%A3%80%E9%AA%8C.ipynb#%E5%8D%A1%E6%96%B9%E6%A3%80%E9%AA%8C(Chi-square-test)> 用于检验两个(或多个)率或构成比之间差别是否有统计学意义,配对卡方检验检验配对计数资料的差异是否有统计学意义。 基本思想...
a/b为两组样本数据,具有相同的shape(行列数);axis数组的读取方向,如果没有则计算整个数组a、b;equal_var默认true,执行假设总体方差相等的标准独立双样本检验,为false则执行welchde t-test,不假设方差相等;alterative定义备择假设,two-sided为双边检验,less为左尾检验,greater为右尾检验。 返回的是t检验统计量值和...
When you can run a Z Test. Several different types of tests are used in statistics (i.e.f test,chi square test,t test). You would use a Z test if: Yoursample sizeis greater than 30. Otherwise, use at test. Data points should beindependentfrom each other. In other words, one data...
F-test is a ratio of two Chi-squares:两个卡方统计量的比值。 分子计算:组间方差: 分母计算:组内方差: 是第 个group的均值, 为总样本均值, 为组数, 为 组的样本量 最后计算出F值之后,查临界值表(这个统计量服从 , 的F分布,F值越大,说明组间方差比组内方差大的越多。则说明组间均值存在差异。
Unlike the chi square test for single variance, this test is used if n ≥ 30. Z-test for testing equality of variance is used to test the hypothesis of equality of two population variances when the sample size of each sample is 30 or larger....
山行 作者：杜牧
under Chi-Square Tests Most data analysts are familiar with post hoc tests for ANOVA. Oddly, post hoc tests for the chi-square independence test are not widely used. This tutorial walks you through 2 options for obtaining and interpreting them in SPSS....
On theχ2χ2-test of independence:https://www.statisticssolutions.com/non-parametric-analysis-chi-square/ Anyway, if the data looks like that you presented, you don't even have to do the math! There is statistically significant difference with a p-value of virtually 0!
Critical Values of the t-Distribution Statistical Table Hypothesis Testing for Multiple Samples: Definition & Examples Goodness of Fit Test | Definition, Types & Examples Chi-Square Test of Independence: Example & Formula Create an account to start this course today Used by over 30 million student...