A study is designed to investigate whether there is a difference in response to various treatments in patients with rheumatoid arthritis. The outcome is patient's self-reported effect of treatment. The data are shown below. Are symptoms independent of treatment? Conduct a ChiSquare test at a 5% level of significance.
Treatment 1: Symptoms Worsened= 22 No Effect=14 Symptoms Improved=14 Total=50
Treatment 2: Symptoms Worsened=14 No Effect= 15 Symptoms Improved= 21 Total=50
Treatment 3: Symptoms Worsened= 9 No Effect=12 Symptoms Improved= 29 Total=50