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In a one sample design, to test whether there is a mean difference in the time to cause a headache to stop the following was

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In a one sample design, to test whether there is a mean difference in the time to cause a headache to stop the following was obtained for the difference column Difference : 2 4 6 8 Determine whether there is a significant difference in the time to cause the headache to stop at 95% accuracy level? (20 marks)

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