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A 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:

37 31 68 29 32 61 66 63 129

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.

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