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In a study of facial behavior, people in a control group are timed for eye contact in a 5-minute period. Their times are normally distributed

In a study of facial behavior, people in a control group are timed for eye contact in a 5-minute period. Their times are normally distributed with a mean of 186.0 seconds and a standard deviation of 51.0 seconds. ONLY Use the 68-95-99.7 rule to find the indicated quantity:

Find the percentage of times within 51.0 seconds of the mean of 186.0 seconds.

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