The t-test for two samples can be performed with or without the assumption of the equal variances and in both the cases, the test statistic and the degrees of freedom are computed in a different manner. Unless variance in one sample is mor...
Answer to: If the test statistic is 2.79 for a two-sided t-test for the difference in two means for which n1 = 13, n2 = 17, s1 = 7, and s2 = 5,...
The proposed method is based on the maximum of standardized partial sums of logarithmic p-values statistic. Numerical studies show that the method performs well for both normal and non-normal data and has a good power performance under both dense and sparse alternative hypotheses. For illustration,...
A z-score, or z-statistic, is a number representing how many standard deviations above or below the mean population the score derived from a z-test is. Essentially, it is a numerical measurement that describes a value's relationship to the mean of a group of values. If a z-score is 0...
Based on the simulation results, the robust chi‐square difference test statistic with the mean and variance adjustment is shown to be efficient in ... Y Chang,W Huang,R Tsai - 《Journal of Educational Measurement》 被引量: 3发表: 2015年 Robust Brown-Forsythe and Robust Modified Brown-Forsyt...
a goodness-of-fit statistic Q n based on the Hoeffding maximum correlation for testing uniformity and we show its relationship to Gini's mean difference... J Fortiana,A Grané - 《Journal of the Royal Statistical Society》 被引量: 31发表: 2003年 Gini’s multiple regressions: two approaches...
For a 1-sample t-test, when the sample mean equals the hypothesized mean, the numerator is zero, which causes the entire t-value ratio to equal zero. As the sample mean moves away from the hypothesized mean in either the positive or negative direction, the test statistic moves away from ...
However, these methods have only been applied in narrow fields and not available for a global testing result. Refs. [8,9] proposed an 𝐿2-norm based statistic to test the equality of mean functions. Ref. [10] proposed and studied a so-called Globalized Pointwise F-test, abbreviated as ...
A t-test is an inferential statistic used to determine if there is a statistically significant difference between the means of two variables. The t-test is a test used for hypothesis testing in statistics. Calculating a t-test requires the difference between the mean values from each data set...
8a. TEST OF HYPOTHESIS(2)TestofHypothesis Dr.JosephineQ.BorjaENGSTAT StatisticalDecisionTheory Decisionsmadeonsampleinformation. DecidewhetherobservedsamplesdiffersignificantlyfromthatofthepopulationHypothesis-Assumptionsorguessesaboutthepopulation.StatisticalHypothesis–astatementabouttheparametersofoneormore...