Question: SGOT is an enzyme that shows elevated activity when the heart muscle is damaged. In a study of 31 patients who underwent heart surgery, serum

SGOT is an enzyme that shows elevated activity when the heart muscle is damaged. In a study of 31 patients who underwent heart surgery, serum levels of SGOT were measured 18 hours after surgery.30 The mean was 49.3 U/l and the standard deviation was 68.3 U/l. If we regard the 31 observations as a sample from a population, what feature of the data would cause one to doubt that the population is normal?

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