non parametric one-sample Wilcoxon rank test. 现在我们想知道这10只小鼠的平均重量是否等于25g(two-tailed test)? # One-sample t-test res <- t.test(my_data$weight, mu = 25) # Printing the results res image.png 上图的结果表明: t为t检验统计量,t = -9.0783 df是自由度,df=9 p-value是t...
从normality plot，我们可以看出，我们的数据可能来自正态分布。 注意： 如果你的数据是非正态分布的，推荐你使用 non parametric one-sample Wilcoxon rank test. 现在我们想知道这10只小鼠的平均重量是否等于25g（two-tailed test）?上图的结果表明： t为t检验统计量，t = -9.0783 ...
One-Sample T Test One-SampleTTestTwoIndependent-SamplesTTestTwoPaired-SamplesTTest Toconfirmtheheightofjuvenileaged12-15inacitywhetheritcomplywithastandardfor height160.0cm,wemakeasamplesurveytothecity'sjuvenileatthesameage,thesamplesasfollows.TaketheExample0.05significancelevel1thedatatoofmakethirty...
双尾检验（Two-tailed Test）和单项检验（One-tailed Test）是统计学中常用的两种假设检验方法，在拒绝或接受原假设的方式上有所不同。双尾检验：在双尾检验中，我们关心的是样本统计量与原假设预期值之间是否存在显著差异，而不涉及方向性的假设。我们将研究兴趣放在样本统计量过大或者过小的情况下。所...
Two-tailed one-sample t test example:A farmer calculated last year the average of the apples' weight in his apple orchard μ0 equals 90 grams, based on the entire population.The current year he checked a small sample of apples and the sample average x̄ equals 82 kgHas the average of...
Steps of One-Sample T-Test 1. State Hypothesis Null (H0H0): No difference between sample mean and population mean (H0:μ=μ0H0μ0) Alternative (HaHa): Difference between the sample mean and population mean (H0:μ≠μ0H0μμ0) for a two-tailed test) ...
The null hypothesis is the same in a one-tailed test, but the alternative hypothesis is that the population mean is higher (or smaller, depending on the case) than the hypothesised value. Example of one sample t-test in R Let’s say we have a sample of values as follows: set.seed(...
There are two types of significance to consider when interpreting the results of a one samplet-test, statistical significance and practical significance. Statistical Significance Statistical significance is determined by looking at thep-value. Thep-value gives the probability of observing the test res...
我也看这的。一下仅供参考。。。T-test 可能是假设检验（概率论与数理统计）里面的t 分布。one-Tailed t-Test 单边t分布（就是分布图的一侧，一般都是正侧） 。two就是双边
Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授。PDF笔记下载(Academia.edu)SummaryOne-sample $t$ testTest for a popul