<prompt> Ten readings of BP taken before and after treatment is studied by-Paired t testZ testStudents t testCorrelation test  <response>: Ref:Parks 23rd edition pg 852 Here a Quantitative measurement is taken. But there is only a single group before and after intervention. so., paired T test is used . 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. 