In 88 infantsresearchers measure the change in heart rate, Ask an Expert

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In 88 infants,researchers measure the change in heart rate before and after brightening the room. The distribution of changes ranges from 20 to 5 beats per minute, with a mean of 9.7. (Heart rate usually slows when an organism pays attention to a stimulus.) Upon rechecking, the lowest score turns out to be 24. Which measures of variability are affected by the correction?

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