Bookmarks People Window Help Derrick Do This Problem uni Black, Business Statist

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Bookmarks People Window Help Derrick Do This Problem uni Black, Business Statistics, 8e BUSINESS STATISTICS (ECON 245) ctice Gradebook ORION ment FULL SCREEN PRINTER VERSTON BACK Question 27 The us. national average door-to-doctor wait time for patients to see a doctor is now 21.3 minutes. Suppose Achat tres 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 wat more than how many minutes to see a doctor? (Round z value to 2 decimal places. Round your answer to 2 decimal places.) Question Attempts: 0 of 1 used SAVE FOR LATER SUBMIET ANSWER SUBMIT ANSWER Copyright © 2000-2016 by John Wiley & Sons, Inc. or related companies. An nghts reserved. aliy I 2000-2016 Jahn Wiey &Sons.ioc;, All Rights Reserved, A Division of 2ohn ySa Version 4.17.3 t-test/agist. uni# 13

Explanation / Answer

First, we get the z score from the given left tailed area. As          
          
Left tailed area = 1 - 0.03 =   0.97      
          
Then, using table or technology,          
          
z =    1.88      
          
As x = u + z * s,          
          
where          
          
u = mean =    21.3      
z = the critical z score =    1.88      
s = standard deviation =    6.7      
          
Then          
          
x = critical value =    33.896   = 33.90 [ANSWER]  

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