Torsion during hip external rotation (ER) and extension may be responsible for certain kinds of injuries in
Question:
The following data was supplied by the article's authors.
a. Is it plausible that the differences came from a normally distributed population?
b. The article reported that mean (± SD) =-145.3(68.0) for ER velocity and = -227.8(96.6) for IR velocity. Based just on this information, could a test of hypotheses about the difference between true average IR velocity and true average ER velocity be carried out? Explain.
c. The article stated that "The lead hip peak IR velocity was significantly greater than the trail hip ER velocity (p50.003, t value53.65)." (The phrasing suggests that an upper-tailed test was used.) Is that in fact the case?
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Related Book For
Probability And Statistics For Engineering And The Sciences
ISBN: 9781305251809
9th Edition
Authors: Jay L. Devore
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