Question: Two physicians were asked to classify 100 chest X-rays as abnormal or normal independently. The comparison of their classification is shown in the following table:

Two physicians were asked to classify 100 chest X-rays as abnormal or normal independently. The comparison of their classification is shown in the following table: Classification of Chest X-Rays by Physician 1 compared with Physician 2 Physician 2 Physician 1 Abnormal Normal Total Abnormal 40 20 60 Normal 10 30 40 Total 50 50 100

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