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From the t-test, the difference between the group means is 6-2=4. From the regression, the slope is also 4 indicating that a 1-unit change in drug dose (from 0 to 1) gives a 4-unit change in mean word recall (from 2 to 6). The t-test p-value for the difference in means, and the regression p-value for the slope, are both 0.00805. The methods ...
Most frequently, t statistics are used in Student's t-tests, a form of statistical hypothesis testing, and in the computation of certain confidence intervals. The key property of the t statistic is that it is a pivotal quantity – while defined in terms of the sample mean, its sampling distribution does not depend on the population parameters, and thus it can be used regardless of what these ...
The phrase "T distribution" may refer to Student's t-distribution in univariate probability theory, Hotelling's T-square distribution in multivariate statistics.
In statistics, the matrix t-distribution (or matrix variate t-distribution) is the generalization of the multivariate t-distribution from vectors to matrices. [1] [2]The matrix t-distribution shares the same relationship with the multivariate t-distribution that the matrix normal distribution shares with the multivariate normal distribution: If the matrix has only one row, or only one column ...
The English Wikipedia is the primary [a] English-language edition of Wikipedia, an online encyclopedia.It was created by Jimmy Wales and Larry Sanger on 15 January 2001, as Wikipedia's first edition.
Washington, DC: U.S. Congress, Office of Technology Assessment. OTA-BP-H-22. Archived from the original (PDF) on 2016-03-03. "REFLECT (Reporting guidElines For randomized controLled trials for livEstoCk and food safeTy) Statement". Wathen JK, Cook JD (12 July 2006). "Power and bias in adaptively randomized clinical trials" (PDF).