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25 votes
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At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 18 minutes and a standard deviation of 4 minutes. Using the empirical rule, determine the interval of minutes that the middle 68% of customers have to wait.

User Ahaurat
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15 votes
15 votes
14-22 minutes. 18-4=4, 18+4=22
User A Better Oliver
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