At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 16 minutes and a standard deviation of 5 minutes. What percentage of customers have to wait less than 8 minutes, to the nearest tenth?
Added by Craig R.
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The z-score is calculated by subtracting the mean from the value and then dividing by the standard deviation. So, for 8 minutes, the z-score would be (8 - 16) / 5 = -1.6. Show more…
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