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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 ...
For the statistic t, with ν degrees of freedom, A(t | ν) is the probability that t would be less than the observed value if the two means were the same (provided that the smaller mean is subtracted from the larger, so that t ≥ 0). It can be easily calculated from the cumulative distribution function F ν (t) of the t distribution:
Another is Hotelling's T 2 statistic follows a T 2 distribution. However, in practice the distribution is rarely used, since tabulated values for T 2 are hard to find. Usually, T 2 is converted instead to an F statistic. For a one-sample multivariate test, the hypothesis is that the mean vector (μ) is equal to a given vector (μ 0).
WASHINGTON −The Senate’s top Republican questioned on Sunday how easy it will be for President-elect Donald Trump to launch a “mass deportation” of at least 11 million immigrants living in ...
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The body of a woman who disappeared 10 years ago has been found in a minivan submerged in a Florida pond. Yekaterina “Katya” Belaya, a mom of three, was last seen heading to a store in 2014 ...
In statistics, particularly in hypothesis testing, the Hotelling's T-squared distribution (T 2), proposed by Harold Hotelling, [1] is a multivariate probability distribution that is tightly related to the F-distribution and is most notable for arising as the distribution of a set of sample statistics that are natural generalizations of the statistics underlying the Student's t-distribution.
Excel 97 included a new and improved PivotTable Wizard, the ability to create calculated fields, and new pivot cache objects that allow developers to write Visual Basic for Applications macros to create and modify pivot tables; Excel 2000 introduced "Pivot Charts" to represent pivot-table data graphically