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Following is a set of data for 180 people undergoing a knee replacement treatment with a drug supplement. Treatment with drug X Treatment without Drug
Following is a set of data for 180 people undergoing a knee replacement treatment with a drug supplement.
Treatment with drug X Treatment without Drug X Total
Had > 8 wk rehab 18 32 50
Had < 8 wk rehab 70 60 130
Total88 92 180
a.Calculate the chi-square statistic [10 points]
b.Is the value of the chi-square statistically significant at the 0.05 level? [3 points]
c.Write a paragraph summarizing and interpreting (in plain English/non-statistical language) the results of the chi-square analysis. [7 points]
ANS.
a.
b.
c.
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