Answered: For Questions 17 – 18, refer to the…

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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Transcribed Image Text:For Questions 17– 18, refer to the problem below. The lifetimes of a certain brand of car batteries have an average span of 4 years with a standard deviation of 6 months. Assume these lifetimes are normally distributed. 17. What percentage of these batteries is expected to last between 3 and 4.5 years? A 81.85% В 13.59% 95.44% D 78.19% If the company that sells these batteries wishes that no more than 5% of them are to be replaced, what must be the approximate maximum warranty period? 18. A 45 months B 36 months C 24 months D 38 months 19. If each member of a population has an equal chance of being selected for a sample, the method used is: A Stratified sampling. Systematic sampling. Random sampling. Cluster sampling.

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