What is the meaning of the chi-square test? A chi-square test is a statistical test that can figure out if there is any statistical significance between categorical variables. It is used to determine if results are due to chance or due to some relationship between the studied variables. ...
chi-square test n. A test that uses the chi-square statistic to test the fit between a theoretical frequency distribution and a frequency distribution of observed data for which each observation may fall into one of several classes. American Heritage® Dictionary of the English Language, Fifth ...
Chi-square, a non-parametric test of significance, is an appropriate test when the data are in the form of frequency counts occurring in two or more mutually exclusive categories (nominal variables). It enables us to decide on the basis of sample if (1) a given set of counts (or ...
chi-square test noun /ˈkaɪ skwɛr ˌtɛst/ (statistics) a calculation that is used to test how well a set of data fits the results that were expected according to a theory Definitions on the go Look up any word in the dictionary offline, anytime, anywhere with theOxford ...
The Chi-Square Test of Significancedoi:10.1007/978-3-642-96732-0_11We previously noted the widespread occurrence in nature of the chi-square probability law. It was also found to describe the random behavior of the sample variance. Here we shall show how the...B. Roy Frieden...
卡方检验是一种用途很广的计数资料的假设检验方法。它属于非参数检验的范畴,主要是比较两个及两个以上样本率( 构成比)以及两个分类变量的关联性分析。其根本思想就是在于比较理论频数和实际频数的吻合程度或拟合优度问题。 它在分类资料统计推断中的应用,包括:两个率或两个构成比比较的卡方检验;多个率或多个构成...
卡方检验(Chi-square Test),也称卡方拟合优度检验(Chi-square Goodness-of-Fit Test),用于检验样本数据是否与某种概率分布的理论数值相符合,进而推断样本数据是否来自于该分布的样本问题。例如,抽奖球编号0至9,根据出现的数字概率是否均匀,即0至9的出现概率是否为1/10。
The Chi-Square Test is the widely used non-parametric statistical test that describes the magnitude of discrepancy between the observed data and the data expected to be obtained with a specific hypothesis.
> b<-data.frame(CD=c(19,34),contol=c(24,10))>b CD contol 1 19 24 2 34 10 > chisq.test(b)$expected CD contol [1,] 26.1954 16.8046 [2,] 26.8046 17.1954 在通过判断理论值T及总数n进行选择Chi-square test还是Fisher exact test
The Chi-Square Test from Chapter 2 / Lesson 13 30K In statistical analysis, to determine the probability that variance between results is due to chance, a chi-square test is used. See the exampled benefit situation provided, and learn the details of this test as well as where to use ...