The maintenance department in charge of acity's street lights finds that it is cost-efficientto replace all street light bulbs at once (1 bulbper streetlight), rather than replace bulbsindividually as they burn out. Assume thelifetime of a bulb is normally distributed with amean of 3000 hours and a standard deviationof 200 hours. The department wants, onaverage, no more than 2.5% of the bulbs toburn out before replacement.With reference to the information, anotherstretch of road has 73 streetlights. What arethe mean and standard deviation of thenumber of bulbs that will already be burnedout on this stretch of road at the scheduledreplacement time?

Answered: Image /qna-images/answer/77dbd922-3239-41b5-b799-a32cd120e9e9.jpg

Answered: With reference to the information,…

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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With reference to the information, another stretch of road has 73 streetlights. What are the mean and standard deviation of the number of bulbs that will already be burned out on this stretch of road at the scheduled replacement time?