<prompt> A cardiologist wants to study the effect of an antihypeensive drug. He notes down the initial systolic blood pressure mmHg of 50 patients and then administers the drug on them. After a weeks tretment, he measures the systolic blood pressure again. Which of the following is the most aproprate statistical test of significance to test the statistical significance of the change in blood pressure ?Paired t-testUnpaired or independent t-testAnalysis of varianceChi-square test  <response>: Ans. is a i.e., Paired t-test In this question :- i Data is quantitative BP ii Paired sample from same patients, before and after treatment. o So, Paired t-test is the best. 