Torn ACL Having at least one 15-minute warm-upsession per week resulted in a drastic reduction in tearsin the anterior cruciate ligament (ACL). In a studyinvolving about 4500 adolescent girls’ soccer players inSweden, one group was randomly assigned to warm upwith a neuromuscular exercise session. This group had64% fewer ACL tears than the control group.a) Is this an experiment or an observational study?Explain why.b) Identify the treatments in this study. What is theresponse variable?c) Give one statistical advantage of using only Swedishgirls who played soccer in this study.d) Give one statistical disadvantage of using onlySwedish girls who played soccer in this 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
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Torn ACL Having at least one 15-minute warm-up
session per week resulted in a drastic reduction in tears
in the anterior cruciate ligament (ACL). In a study
involving about 4500 adolescent girls’ soccer players in
Sweden, one group was randomly assigned to warm up
with a neuromuscular exercise session. This group had
64% fewer ACL tears than the control group.
a) Is this an experiment or an observational study?
Explain why.
b) Identify the treatments in this study. What is the
response variable?c) Give one statistical advantage of using only Swedish
girls who played soccer in this study.
d) Give one statistical disadvantage of using only
Swedish girls who played soccer in this study.

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