A medical researcher wants to determine whether exercising can lower blood pressure. She recruits 100 people with high blood pressure to participate in the study. She assigns a random sample of 50 of...

Extracted text: A medical researcher wants to determine whether exercising can lower blood pressure. She recruits 100 people with high blood pressure to participate in the study. She assigns a random sample of 50 of them to pursue art exercise program that includes daily swimming and jogging. She assigns the other 50 to refrain from vigorous activity. She then measures the blood pressure of each of the 100 individuals both before and after the study. Questions: a) Is this an experiment or an observational study? Explain. b) Identify the sample used in this study. c) Describe the population in this study. d) Identify the treatment group. e) What is the independent variable in this study? f) What is the goal of the study? g) Identify a confounding variable that may affect the result of this study?