SOLUTION: The average commute to work(one way) is 25.5 minutes according to the 2000 census. If we assume that commuting times are normally distributed with a standard deviation of 6.1 minut

Question 195259: The average commute to work(one way) is 25.5 minutes according to the 2000 census. If we assume that commuting times are normally distributed with a standard deviation of 6.1 minutes, what is the probability that a randomly selected commuter spends more than 30 minutes a day commuting one way?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The average commute to work(one way) is 25.5 minutes according to the 2000 census.
If we assume that commuting times are normally distributed with a standard deviation of 6.1 minutes, what is the probability that a randomly selected commuter spends more than 30 minutes a day commuting one way
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Find the z-value of 30 minutes.
z(30) = (30-25.5)/6.1 = 0.7377
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P(x > 30) = P(z > 0.7377) = 0.2303
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Cheers,
Stan H.
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