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 an 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 observational study? Please explain. B: Identify the sample used in the study. C: Describe the population in the study. D: Identify the treatment group. E: What is the goal of the study? F: Identify the confounding variable that may affect the result of the study?
Added by Michelle W.
Step 1
Step 1: Determine whether the study is an experiment or observational study. Show more…
Show all steps
Close
Your feedback will help us improve your experience
Rashmi Sinha and 92 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
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 an exercise program that includes daily swimming and jogging. She assigns the other 50 to refrain from vigorous activity. She measures the blood pressure of each of the 100 individuals both before and after the study.
Qudsiya A.
A study was conducted to determine whether lifestyle changes could replace medication in reducing blood pressure among hypertensives. The factors considered were a healthy diet with an exercise program, the typical dosage of medication for hypertension, and no intervention. The pre-treatment body mass index (BMI) was also calculated because it is known to affect blood pressure. The response considered in this study(a) Fit an appropriate model using the data above. Does it appear that exercise and diet could be effectively used to lower blood pressure? Explain your answer from the results. (b) Would exercise and diet be an effective alternative to medication? (Hint. You may wish to form the model in more than one way to answer both of these questions.)
Multiple Linear Regression and Certain Nonlinear Regression Models
Special Nonlinear Models for Nonideal Conditions
A medical researcher is studying the effects of a drug on blood pressure. Subjects in the study have their blood pressure taken at the beginning of the study. After being on the medication for 4 weeks, their blood pressure is taken again. The change in blood pressure is recorded and used in doing the hypothesis test. Change: Final Blood Pressure - Initial Blood Pressure The researcher wants to know if there is evidence that the drug reduces blood pressure. At the end of 4 weeks, 36 subjects in the study had an average change in blood pressure of -2.0 with a standard deviation of 4.5. Find the p-value for the hypothesis test. Your answer should be rounded to 4 decimal places
Juan N.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD