In a Japanese study, “researchers looked at 35 peoplewith lower back pain who were enrolled in an aquatic exercise program, which included swimming and walk-ing in a pool. Almost all of the patients showed improve-ments after six months, but the researchers found that those who participated at least twice weekly showedmore significant improvement that those who wentonly once per week.”Which of the following statements is true?a) This experiment proves that swimming causes areduction in lower back pain.b) This study is a poorly designed experiment sincethere is no control group and no randomization.c) Conclusions based on this observational study aresuspect since participation in the aquatic programmay be confounded with other lifestyle behaviors thatmay cause the improvement in lower back health.d) Conclusions based on this observational study aresuspect since a sample size of 35 is too small.e) This study is not an observational study since theaquatic program is a treatment.
In a Japanese study, “researchers looked at 35 peoplewith lower back pain who were enrolled in an aquatic exercise program, which included swimming and walk-ing in a pool. Almost all of the patients showed improve-ments after six months, but the researchers found that those who participated at least twice weekly showedmore significant improvement that those who wentonly once per week.”Which of the following statements is true?a) This experiment proves that swimming causes areduction in lower back pain.b) This study is a poorly designed experiment sincethere is no control group and no randomization.c) Conclusions based on this observational study aresuspect since participation in the aquatic programmay be confounded with other lifestyle behaviors thatmay cause the improvement in lower back health.d) Conclusions based on this observational study aresuspect since a sample size of 35 is too small.e) This study is not an observational study since theaquatic program is a treatment.
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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Question
In a Japanese study, “researchers looked at 35 people
with lower back pain who were enrolled in an aquatic
with lower back pain who were enrolled in an aquatic
exercise program, which included swimming and walk-
ing in a pool. Almost all of the patients showed improve-
ments after six months, but the researchers found that
ing in a pool. Almost all of the patients showed improve-
ments after six months, but the researchers found that
those who participated at least twice weekly showed
more significant improvement that those who went
only once per week.”
Which of the following statements is true?
a) This experiment proves that swimming causes a
reduction in lower back pain.
b) This study is a poorly designed experiment since
there is no control group and no randomization.
c) Conclusions based on this observational study are
suspect since participation in the aquatic program
may be confounded with other lifestyle behaviors that
may cause the improvement in lower back health.
d) Conclusions based on this observational study are
suspect since a sample size of 35 is too small.
e) This study is not an observational study since the
aquatic program is a treatment.
more significant improvement that those who went
only once per week.”
Which of the following statements is true?
a) This experiment proves that swimming causes a
reduction in lower back pain.
b) This study is a poorly designed experiment since
there is no control group and no randomization.
c) Conclusions based on this observational study are
suspect since participation in the aquatic program
may be confounded with other lifestyle behaviors that
may cause the improvement in lower back health.
d) Conclusions based on this observational study are
suspect since a sample size of 35 is too small.
e) This study is not an observational study since the
aquatic program is a treatment.
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