Question

A cardiologist states, "The QT interval corrected for heart rate (QTc) is believed to reflect sympathovagal balance. It has also been established that B-blockers influence the autonomic nervous system." The researchers performed correlation analysis to measure the association between QTc interval, heart rate, heart rate change, and therapeutic blood pressure response for 73 hypertensive subjects taking b-blockers. The researchers found that QTc interval length, pretreatment heart rate, and heart rate change with therapy were not good predictors of blood pressure response to B-blockers in hypertensive subjects. What is the sampled population and what is the target population, respectively? A. Sampled population-hypertensive patients available for the study (73 samples); target B. Sampled population- all patients with hypertension; target population hypertensive C. Sampled population- all patients with abnormal QTc interval; target population D. Sampled population- patients with QTc interval of 450 (37 samples); target population population-all patients with hypertension patients available for the study (73 samples) patients with QTc interval of 450 (37 samples) all patients with abnormal QTc interval

Answer 1

Sol:

sample is subset of population

we apply the sample results to population

sample size =n=73

population =all hypertensive subjects

MARK OPTION A