A research study investigates the occurrence of extra heartbeats between untrained and trained older patients at risk for heart attack. Researchers decide to test whether there is a significant difference in the number of extra beats depending on training status. They obtain measurements over 10 minutes, summarized below. What did they find? If there is a significant difference, how big of one is there? (Provide a range.) dfadi = 25 (if needed) Status # patients Untrained 43 Mean # extra beats/10 min 72.46 32.35 Standard Deviation Minimum # extra beats Maximum # of extra beats Skew Kurtosis 28 165 -0.21 0.62 Trained 21 169.50 62.93 66 266 0.13 -0.1

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