R代码# t-test在R里使用t.test进行计算 >data<- c(14, 14, 16, 13, 12, 17, 15, 14, 15, 13, 15, 14)> t.test(data, alternative = "two.sided", mu=15)OneSamplet-testdata:datat= -1.6848, df =11, p-value =0.1201alternativehypothesis: true mean is not equal to1595percent confid...
根据研究设计和资料的性质有单个样本t检验、配对样本t检验、两个独立样本t检验以及在方差不齐时的t'检验 单样本t检验 单样本t检验(one-sample t-test)又称单样本均数t检验,适用于样本均数$\overline{X}$与已知总体均数$\mu_{0}$的比较,其比较目的是检验样本均数所代表的总体均数µ是否与已知总体均数$\mu_{...
factory_a=np.full(30,355)+np.random.normal(0,3,30)factory_b=np.full(30,353)+np.random.normal(0,3,30)# Run a1sample t-testforeach one a_stat,a_pval=stats.ttest_1samp(a=factory_a,popmean=355,alternative='two-sided')b_stat,b_pval=stats.ttest_1samp(a=factory_b,popmean=355,a...
# Create fake data sample of 30 cans from 2 factories factory_a = np.full(30, 355) + np.random.normal(0, 3, 30) factory_b = np.full(30, 353) + np.random.normal(0, 3, 30) # Run a 1 sample t-test for each one a_stat, a_pval = stats.ttest_1samp(a=factory_a, popmea...
^How To Perform A One-Sample T-Test in Excel, https://toptipbio.com/one-sample-t-test-excel/ ^Richard A. DeFusco, PHD, CFA, Dennis W. McLeavey, DBA, CFA, Jerald E. Pinto, PhD, CFA, and David E. Runkle, PhD, CFA, (2019) "Reading 11. Hypotheis Testing", CFA Curriculum, ...
# Run a 1 sample t-test for each one a_stat, a_pval = stats.ttest_1samp(a=factory_a, popmean=355, alternative='two-sided') b_stat, b_pval = stats.ttest_1samp(a=factory_b, popmean=355, alternative='two-sided') # Display results ...
(0, 3, 30) # Run a 1 sample t-test for each one a_stat, a_pval = stats.ttest_1samp(a=factory_a, popmean=355, alternative='two-sided') b_stat, b_pval = stats.ttest_1samp(a=factory_b, popmean=355, alternative='two-sided') # Display results print("Factory A- t-stat: {...
在Python中,用于多组比较的T-Test是通过使用scipy库中的stats模块来实现的。T-Test是一种统计方法,用于比较两个或多个样本之间的均值是否存在显著差异。 在进行多组比较时,可以使用scipy.stats模块中的函数f_oneway()来执行单因素方差分析(One-way ANOVA)。该函数接受多个数组作为参数,每个数组代表一个样本。它返...
Grubbs’Test为一种假设检验的方法,常被用来检验服从正态分布的单变量数据集(univariate data set)Y中的单个异常值。若有异常值,则其必为数据集中的最大值或最小值。原假设与备择假设如下: H0: 数据集中没有异常值 H1: 数据集中有一个异常值 使...
tearDown(): Runs after each test method.例如，如果你需要连接数据库或者创建临时文件作为测试的一部分，可以利用这两个方法：For example, if you need to connect to a database or create temporary files as part of your tests, you can use these two methods:七、参数化测试（Parameterized Testing）有...