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5.5.30. A drug is suspected of causing an elevated heart rate in a certain group of high-risk patients. Twenty patients from the group were given the drug. The changes in heart rates were found to be as follows 1 8 5 10 2 12 7 913 4 6 4 12 1 2- 10 2 8 Construct a 98% confidence interval for the mean change in heart rate. Assume that the population has a normal distribution. Interpret your answer

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Where, -x*Mean taNt-table value c Corftelence Interval [3319, T.Dal )lk ase 98% suse tfet.tfe inkaval.[3.319) 8.08订 to ue pop

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