In a recent year, the average daily circulation of the Wall Street Journal was 2,276,207. Suppose the standard deviation is 70,940.Assume the paper's daily circulation is normally distributed.(a) On what percentage of days would circulation pass 2,392,000?(b) Suppose the paper cannot support the fixed expenses of a full-production setup if the circulation drops below 2,087,000. If theprobability of this even occurring is low, the production manager might try to keep the full crew in place and not disrupt operations.How often will this even happen, based on this historical information?(Round the values of z to 2 decimal places, e.g. 1.25. Round your answers to 4 decimal places, e.g. 0.2531.)(a) P(x > 2,392,000) =(b) P(x < 2,087,000) =

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Answered: In a recent year, the average daily…

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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Suppose that the lifetimes of TV tubes are normally distributed with a standard deviation of 1.2 years. Suppose also that exactly 20% of the tubes die before 5 years. Find the mean lifetime of TV tubes. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
Assume that the lifetime of a certain component has an exponential distribution with mean 5 (and that time is measured in years). a. What is the standard deviation of lifetimes? b. What is the probability that a component lasts longer than 10 years? c. What is the probability that a component will function for at least 10 years, given that it has already function for 3 years?
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It is known to show an exponential distribution where the average lifespan of a type of CPU is ten years. What is the probability that the company that leases the server for ten years will encounter a central processing unit failure within the period of use?
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