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.
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.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
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Transcribed Image 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?
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