Navigation Links
Chi-square test


A chi-square test is any statistical hypothesis test in which the test statistic has a chi-square distribution if the null hypothesis is true. These include:

  • Pearson's chi-square test
  • Some likelihood-ratio tests are approximately chi-square tests when the sample-size is large. They are widely used in logistic regression. Other likelihood-ratio tests cannot be regarded as even approximately chi-square tests; e.g., F-tests in the analysis of variance and t-tests are likelihood-ratio tests, but the test statistic does not have a chi-square distribution under the null hypothesis.
  • Yates' chi-square test, or Yates' correction for continuity
  • Mantel-Haenszel chi-square test
  • linear-by-linear association chi-square test

All such tests involve a statistic of the form

where the word "expected" often does not denote an expected value, but an observable estimate of an expected value.



'"/>


(Date:1/20/2016)... Minn. , Jan. 20, 2016   MedNet ... supports the entire spectrum of clinical research, is pleased ... 2015. MedNet,s significant achievements are the result of the ... iMedNet eClinical , it,s comprehensive, easy-to-use ... --> --> Key MedNet growth achievements ...
(Date:1/18/2016)... 2016  Extenua Inc., a pioneering developer of ... and access of ubiquitous on-premise and cloud storage, today ... Cyber.  ... C4ISR and Cyber initiatives in support of National ... technology solutions," said Steve Visconti , Extenua ...
(Date:1/13/2016)... January 13, 2016 --> ... a new market report titled - Biometric Sensors Market - ... 2015 - 2023. According to the report, the global biometric sensors ... anticipated to reach US$1,625.8 mn by 2023, expanding at ... terms of volume, the biometric sensors market is expected ...
Breaking Biology News(10 mins):
Other biology definition