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Analyzing 5 headache tablet brands in providing relief hours for subjects with fevers of 38°C or more, testing if the mean relief hours are same across brands at 0.05 significance level.
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The data in the following table represent the number of hours of relief provided by 5 different brands of headache tablets administered to 25 subjects experiencing fevers of 38 C or more. Test at 0.05 significance level that the mean number of hours of relief provided by the tablets is the sam efor all 5 brands.