Question 674417: The U.S. national average door-to-doctor wait time for patients to see a doctor is now 21.3 minutes. Suppose such wait times are normally distributed with a standard deviation of 6.7 minutes. Some patients will have to wait much longer than the mean to see the doctor. In fact, based on this information, 3% of patients still have to wait more than how many minutes to see a doctor?
Round z value to 2 decimal places. Round your answer to 2 decimal places, the tolerance is +/-0.05.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The U.S. national average door-to-doctor wait time for patients to see a doctor is now 21.3 minutes. Suppose such wait times are normally distributed with a standard deviation of 6.7 minutes. Some patients will have to wait much longer than the mean to see the doctor. In fact, based on this information, 3% of patients still have to wait more than how many minutes to see a doctor?
Round z value to 2 decimal places. Round your answer to 2 decimal places, the tolerance is +/-0.05.
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Find the z-value with a left tail of 0.97
invNorm(0.97) = 1.8808
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Find the corresponding wait value using wait = z*s + u
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wait = 1.8808*6.7+ 21.3 = 33.90 minutes
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Cheers,
Stan H.
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