The Tails of a Distribution 分布的尾部 假设检验的尾部:位于临界值以外的区域(拒绝域),也是一个分布的尾部。从尾部来看,有三种不同的检验: 1、A left-tailed test 左侧检验:拒绝域位于分布的左侧 2、A ri…
The t-distribution describes the standardized distances of sample means to the population mean when the population standard deviation is not known, and the observations come from a normally distributed population.
如果样本容量足够大,这两个分布实际上是相同的。 In general, this distributionisused when you have a small sample size (under 30)oryou don’t know the population standard deviation. For practical purposes (i.e.inthe real world), thisisnearly always the case. So, unlikeinyour elementary statis...
T distribution 定义 在概率论和统计学中,学生t-分布(t-distribution),可简称为t分布,用于根据小样本来估计 呈正态分布且方差未知的总体的均值。如果总体方差已知(例如在样本数量足够多时),则应该用正态分布来估计总体均值。 In probability and statistics, Student's t-distribution (or simply the t-...
The Student's t distribution is a continuous probability distribution that is often encountered in statistics (e.g., inhypothesis tests about the mean). It arises when a normal random variable is divided by a Chi-square or a Gamma random variable. ...
The t-distribution calculator computes probability, based on t statistics. Fast, easy, accurate. An online statistical table. Sample problems and solutions.
Learn more about:How T-tests Work,test statistics,critical values, andHow to do T-Tests in Excel Tables for otherstatisticsinclude thez-table,chi-square table, andF-table. Examples of Using the T-Distribution Table of Critical Values
T-Distribution Table (One Tail). For more info on the parts of the t table, including how to calculate them, see: degrees of freedom and alpha level.
Student's t-distribution is a continuous probability distribution. This lesson explains when and how to use the distribution. Includes problems with solutions.
What is the t-distribution in statistics? The t-distribution is used in statistics to estimate the population parameters for small sample sizes or undetermined variances. It is also referred to as the Student’s t-distribution. When should the t-distribution be used? The t-distribution should b...