SOLUTION: the waiting time at a certain bank is approximately normally distributed with a mean of 3.7 min and a standard deviation of 1.4 min. If a random sample of 2 customers is selected
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Question 539756: the waiting time at a certain bank is approximately normally distributed with a mean of 3.7 min and a standard deviation of 1.4 min. If a random sample of 2 customers is selected find the probability that the average waiting time is more than 6 mins Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! the waiting time at a certain bank is approximately normally distributed with a mean of 3.7 min and a standard deviation of 1.4 min. If a random sample of 2 customers is selected find the probability that the average waiting time is more than 6 mins
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t(6) = (6-3.7)/1.4 = 1.6429
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P(x > 6) = P(t > 1.6429 when df = 1) = 0.1709
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Cheers,
Stan H.
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