Answered: A company selling wristwatch batteries…

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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A company selling wristwatch batteries determines that the fraction of its batteries that last at least c years is given by (equation in picture).

(a) Calculate the fraction of the company’s batteries that last at least 3 years. Show your work and circle your final answer.

(b) An old customer survey indicates that for 114 customers using the company’s watch batteries, 91 of the batteries lasted at least 3 years. Based on the data available, would you say that the quality of the company’s batteries has stayed the same, worsened, or improved since the survey was taken? Clearly answer the question and justify your answer with a few sentences of explanation. You will be graded on how clearly and completely you use the evidence available to justify your answer.

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