A pharmaceuticals company claims to have developed a cure for the common cold
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question.docxA pharmaceuticals company claims to have developed a cure for the common cold. In order to test whether this is true, one group of recent cold-sufferers was given this medicine and another group was given a placebo instead. The selection process was completely random.
The participants were examined two hours after they were given the medicine or placebo. The results are tabulated below:
|
|
||
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37 |
31 |
68 |
|
29 |
32 |
61 |
|
66 |
129 |
You plan to test whether the medicine has any effect on the cold by conducting a chi-square test for association on the data available. Calculate the chi-square test statistic (χ2) using SPSS. Give your answer to 4 decimal places.
a)χ2 =
b)At α = 0.05, the null hypothesis that the medicine has no effect is rejectednot rejected.
