Answered: le homes are tightly constructed for…

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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Mobile homes are tightly constructed for energy conservation. This can lead to a buildup of indoor pollutants. The paper "A Survey of Nitrogen Dioxide Levels Inside Mobile Homes"† discussed various aspects of NO₂ concentration in these structures.

(a)

For one sample of mobile homes in the Los Angeles area, the mean NO₂ concentration in kitchens during the summer was 37.66 ppb, and the standard deviation was 11.18. Making no assumptions about the shape of the NO₂ distribution, what can be said about the percentage of observations between 15.30 and 60.02? (Round the answer to the nearest whole number.)

at least %

(b)

Inside what interval is it guaranteed that at least 89% of the concentration observations will lie for the distribution in part (a)?

(____________ , __________)

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