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Exercise 4.4. It is known that in a company, the average time required to process invoices is 8 days with a standard deviation of 36 hours. If the processing time is normally distributed, what proportion of the invoices is processed between 6 and 11 days? Exercise 4.5. Assuming that the White Blood Cell (WBC) count per cubic millimeter of whole blood is normally distributed with a mean of 6800 and a standard deviation of 1550. The lowest 5% of all WBC counts is defined to be probable at risk. How low must one's WBC count be to fall in the at risk group?

Exercise 4.4. It is known that in a company, the average time required to process invoices is 8 days with a standard deviation of 36 hours. If the processing time is normally distributed, what proportion of the invoices is processed between 6 and 11 days? Exercise 4.5. Assuming that the White Blood Cell (WBC) count per cubic millimeter of whole blood is normally distributed with a mean of 6800 and a standard deviation of 1550. The lowest 5% of all WBC counts is defined to be probable at risk. How low must one's WBC count be to fall in the at risk group?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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4.4 and 4.5
Exercise 4.4. It is known that in a company, the average time required to process invoices is 8 days with a standard deviation of 36 hours. If the processing time is normally distributed, what proportion of the invoices is processed between 6 and 11 days? Exercise 4.5. Assuming that the White Blood Cell (WBC) count per cubic millimeter of whole blood is normally distributed with a mean of 6800 and a standard deviation of 1550. The lowest 5% of all WBC counts is defined to be probable at risk. How low must one's WBC count be to fall in the at risk group?
Transcribed Image Text:Exercise 4.4. It is known that in a company, the average time required to process invoices is 8 days with a standard deviation of 36 hours. If the processing time is normally distributed, what proportion of the invoices is processed between 6 and 11 days? Exercise 4.5. Assuming that the White Blood Cell (WBC) count per cubic millimeter of whole blood is normally distributed with a mean of 6800 and a standard deviation of 1550. The lowest 5% of all WBC counts is defined to be probable at risk. How low must one's WBC count be to fall in the at risk group?
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