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When Hakeem runs the 400-meter dash, his finishing times are normally distributed with a mean of 70 seconds and a standard deviation of 2 seconds. Using the empirical rule, determine the interval of times that represents the middle 68% of his finishing times in the 400-meter race. a) Between 66 and 74 seconds b) Between 68 and 72 seconds c) Between 70 and 74 seconds d) Between 66 and 72 seconds

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So, the middle 68% of his finishing times falls between 68 and 72 seconds. Therefore, the correct option is:

d) Between 66 and 72 seconds
User Matthew Buckett
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