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University
| Teaching Since: | Apr 2017 |
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bachelor in business administration
Polytechnic State University Sanluis
Jan-2006 - Nov-2010
CPA
Polytechnic State University
Jan-2012 - Nov-2016
Professor
Harvard Square Academy (HS2)
Mar-2012 - Present
Patients with painful knee osteoarthritis were randomly assigned in a clinical trial to one of five treatments: glucosamine, chondroitin, both, placebo, or Celebrex, the standard therapy. One outcome recorded was whether or not each patient experienced substantial improvement in pain or in ability to function. The data are given in the following table.30

(a) Use a chi-square test to compare the success rates at.Â
 (The value of the chi-square statistic is![]()
 (b) Verify the value of
 given in part (a).
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