Chi-square Test

From DrugPedia: A Wikipedia for Drug discovery

in biological experiments one can get qualitative data like colour, health , intelligence,cure responce of drug etc which can be classified in praticular category,class or group.to analyze such qulitative data nonparametric test called chi-squar test is performed. in genetic studies it is of great importance where it serve test significance of overall deviation between the observed and expected frequencies. chi- square test was developed by prop. A.R. FISHER in 1870. karl pearson improved fisher's chi-square test in its preasent day form in year 1900. chi-square is derived from greek letter(CHI