When observations are made before and after the exposure to the factor, it is -: (A) Chi-square test, (B) Unpaired T-Test, (C) Paired T-Test, (D) ANOVA test
Answer is C. Ref:Parks 23rd edition pg 852 Tests of significance: Qualitative: Chi- square : 2 or more than 2 groups Mc Nemar test : 1 group. ( before and after intervention) Quantitative: Paired T test: 1 group Student T test/ unpaired T test: 2 groups Anova: more than 2 groups.