pose there are 115 patients in a clinical trial. Of those, 35 received a real medica ess, 20 received the real drug and were not cured, 28 received a sugar pill (placel remaining received a sugar pill and were cured. When testing (at the 5% level of lication was effective (or thinking about it another way, testing whether getting1 ed is independent or not), what is the critical value (please round your answer to
The objective is to test whether getting the medication and being cured is independent or not.
This is the case of Chi-square test for independency.
From the given information,
The total number of patients is, n=115
35 received a real medication and cured , 20 received a real medication and were not cured.
Thus, the total number of persons received real medication is, 35+20=55
The total number of persons received placebo is,
=Total number of patients -(total number of persons got real medication)
=115-55
= 60
The number of persons received placebo and were not cured is, 28.
The number of persons received placebo and were cured is,
= (total number of persons received placebo)-(number of persons received placebo and were cured)
= 60-28
=32
This is displayed in two-way table.
| Illness cured | illness not cured | Total | |
| Real medication | 35 | 20 | 55 |
| Placebo | 32 | 28 | 60 |
| Total | 67 | 48 | 115 |
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