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 week's 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 ?
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.
Paired t-test
Unpaired or independent t-test
Analysis of variance
Chi-square test