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[Analysis of Chinese literatures on evidence-based dentistry between 2001 and 2006]

Yu-hua Wang1, Fu-qiang Zhang

  • 1Department of Prosthodontics, Ninth People's Hospital, College of Stomatology, School of Medicine, Shanghai Jiao Tong University, China.

Shanghai Kou Qiang Yi Xue = Shanghai Journal of Stomatology
|November 16, 2007
PubMed
Abstract

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Chi-square Analysis02:46

Chi-square Analysis

The chi-square test is a statistical hypothesis test. It is used to check whether there is a significant difference between an expected value and an observed value. In the context of genetics, it enables us to either accept or reject a hypothesis, based on how much the observed values deviate from the expected values.
The chi-square test was developed by Pearson in 1990.
The first step of performing a Chi-square analysis is to establish a null hypothesis, which assumes that there is no real...