<prompt> Quantitative test for same group of individuals before and after study is:Paired t-testUnpaired t-testZ-testChi-square test  <response>: Ans. a. Paired t-testTestUsePaired t-testComparing means in paired data In same group of individuals before and after an interventionUnpaired t-testComparing means in two different group of individualsZ-testIt is a variant of t-test which used when sample size is 30Cho-Square testComparing percentage, proportions and fractions in two or more different group of individuals 