Answered: air pollution control specialists in…

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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air pollution control specialists in southern california monitor the amount of ozone, carbon dioxide, and nitrogen dioxide in the air on an hourly basis. the hourly time series data
exhibit seasonality, with the levels of pollutants showing patterns that vary over the hours
in the day. on july 15, 16, and 17, the following levels of nitrogen dioxide were observed
for the 12 hours from 6:00 a.m. to 6:00 p.m.
July 15: 25 28 35 50 60 60 40 35 30 25 25 20
July 16: 28 30 35 48 60 65 50 40 35 25 20 20
July 17: 35 42 45 70 72 75 60 45 40 25 25 25
a. construct a time series plot. What type of pattern exists in the data?
b. Use the following dummy variables to develop an estimated regression equation to
account for the seasonal effects in the data

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