Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Z-test> ?p ?o. }
Showing items 1 to 34 of
34
with 100 items per page.
- Z-test abstract "A Z-test is any statistical test for which the distribution of the test statistic under the null hypothesis can be approximated by a normal distribution. Because of the central limit theorem, many test statistics are approximately normally distributed for large samples. For each significance level, the Z-test has a single critical value (for example, 1.96 for 5% two tailed) which makes it more convenient than the Student's t-test which has separate critical values for each sample size. Therefore, many statistical tests can be conveniently performed as approximate Z-tests if the sample size is large or the population variance known. If the population variance is unknown (and therefore has to be estimated from the sample itself) and the sample size is not large (n < 30), the Student's t-test may be more appropriate.If T is a statistic that is approximately normally distributed under the null hypothesis, the next step in performing a Z-test is to estimate the expected value θ of T under the null hypothesis, and then obtain an estimate s of the standard deviation of T. After that the standard score Z = (T − θ) / s is calculated, from which one-tailed and two-tailed p-values can be calculated as Φ(−Z) (for upper-tailed tests), Φ(Z) (for lower-tailed tests) and 2Φ(−|Z|) (for two-tailed tests) where Φ is the standard normal cumulative distribution function.".
- Z-test wikiPageID "332213".
- Z-test wikiPageRevisionID "599362779".
- Z-test hasPhotoCollection Z-test.
- Z-test subject Category:Normal_distribution.
- Z-test subject Category:Statistical_tests.
- Z-test type Abstraction100002137.
- Z-test type Cognition100023271.
- Z-test type Experiment105798043.
- Z-test type HigherCognitiveProcess105770664.
- Z-test type Inquiry105797597.
- Z-test type ProblemSolving105796750.
- Z-test type Process105701363.
- Z-test type PsychologicalFeature100023100.
- Z-test type StatisticalTests.
- Z-test type Thinking105770926.
- Z-test type Trial105799212.
- Z-test comment "A Z-test is any statistical test for which the distribution of the test statistic under the null hypothesis can be approximated by a normal distribution. Because of the central limit theorem, many test statistics are approximately normally distributed for large samples. For each significance level, the Z-test has a single critical value (for example, 1.96 for 5% two tailed) which makes it more convenient than the Student's t-test which has separate critical values for each sample size.".
- Z-test label "Gauß-Test".
- Z-test label "Test Z".
- Z-test label "Z-test".
- Z-test label "Z-toets".
- Z-test label "Z-тест".
- Z-test label "Z検定".
- Z-test sameAs Gauß-Test.
- Z-test sameAs Test_Z.
- Z-test sameAs Z検定.
- Z-test sameAs Z-toets.
- Z-test sameAs m.01x10v.
- Z-test sameAs Q897827.
- Z-test sameAs Q897827.
- Z-test sameAs Z-test.
- Z-test wasDerivedFrom Z-test?oldid=599362779.
- Z-test isPrimaryTopicOf Z-test.