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• Sample size determination — is the act of choosing the number of observations to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample …   Wikipedia

• Test tube — Two small test tubes held in spring clamps Other names Culture tube Uses Chemical reaction Related items Vacutainer …   Wikipedia

• Test de normalité — En statistiques, les tests de normalité permettent de vérifier si des données réelles suivent une loi normale ou non. Les tests de normalité sont des cas particuliers des tests d adéquation (ou tests d ajustement, tests permettant de comparer des …   Wikipédia en Français

• Bar chart — See also: Histogram Example of a bar chart, with Country as the discrete data set. A bar chart or bar graph is a chart with rectangular bars with lengths proportional to the values that they represent. The bars can be plotted vertically or… …   Wikipedia

• Norm-referenced test — A norm referenced test (NRT) is a type of test, assessment, or evaluation which yields an estimate of the position of the tested individual in a predefined population, with respect to the trait being measured. This estimate is derived from the… …   Wikipedia

• Student's t-test — A t test is any statistical hypothesis test in which the test statistic follows a Student s t distribution if the null hypothesis is supported. It is most commonly applied when the test statistic would follow a normal distribution if the value of …   Wikipedia

• Law School Admission Test — The Law School Admission Test (LSAT) is an examination administered by the Law School Admission Council (LSAC) that attempts to measure logical and verbal reasoning skills. [ [http://www.lsat.com/LSAC.asp?url=lsac/about lsac.asp About the Law… …   Wikipedia

• D'Agostino's K-squared test — In statistics, D’Agostino’s K2 test is a goodness of fit measure of departure from normality, that is the test aims to establish whether or not the given sample comes from a normally distributed population. The test is based on transformations of …   Wikipedia

• Pearson's chi-squared test — (χ2) is the best known of several chi squared tests – statistical procedures whose results are evaluated by reference to the chi squared distribution. Its properties were first investigated by Karl Pearson in 1900.[1] In contexts where it is… …   Wikipedia

• Charpy impact test — v · d · e Materials failure modes Buckling · …   Wikipedia

• Chi-squared test — Chi square test is often shorthand for Pearson s chi square test. A chi square test, also referred to as chi squared test or χ2 test, is any statistical hypothesis test in which the sampling distribution of the test statistic is a chi square… …   Wikipedia