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A woman was tested for diagnosis of heart attack with a 2% chance. The doctors examined ECG with a positive result. ECG accurately predicts about

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A woman was tested for diagnosis of heart attack with a 2% chance. The doctors examined ECG with a positive result. ECG accurately predicts about 80% of heart attacks and 96% of normal heart rhythm. The probability of heart attack was predicted to be about 30% by cardiac doctors. Do you agree? Justify your answer. [5 marks]

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