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Two group of patients suffering from the same medical condition took part
in a clinical
trial of a new drug. One group was given the drug whilst other
group
was given the placebo. The table shows number of patient in each
group and whether or not their condition were improved.
obseved
Placebo
Drug
Total
Improvement
20
46
66
No improvement
total
55
29
84
75
73
150
Conduct the chi test at alpha level 0.05 to determine whether the condition
of the patient is associated with treatment or independent of treatment.