SOLUTION: The mean of the times it takes a commuter to get to work in Baltimore is 29.7 minutes. If the standard deviation is 6 minutes, within what liits would you expect approximately 68%

Question 255708: The mean of the times it takes a commuter to get to work in Baltimore is 29.7 minutes. If the standard deviation is 6 minutes, within what liits would you expect approximately 68% of the times to fall? Assume the distribution is approximately bell-shaped.
Found 2 solutions by stanbon, drk:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The mean of the times it takes a commuter to get to work in Baltimore is 29.7 minutes. If the standard deviation is 6 minutes, within what liits would you expect approximately 68% of the times to fall? Assume the distribution is approximately bell-shaped.
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68% of the times are within one standard deviation of the mean time.
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mean-std = 29.7-6 = 23.7 minutes
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mean+std = 29.7+6 = 35.7 minutes
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Cheers,
Stan H.
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
68% is one standard deviation above and one standard deviation below the mean.
So, we take 29.7 + and - 6 and we get
23.7 to 35.7 minutes in 68% of our data.
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