05 May Air Pollution Control Specialists In Southern California Monitor The Amount Of Ozone, Carbon Dioxide …
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 similar patterns over the hours in the day. On July 15,16 and 17, the observed level of nitrogen dioxide in a city’s downtown area for the 12 hours from 6:00 A.M. to 6:00 P.M. were as follows. 15-Jul 16-Jul 17-Jul a. Identify the hourly seasonal indexes for the 12 hourly daily readings. b. Based on the seasonal indexes in part (a), the trend equation developed for the deseasonalized data T=32.983 + 0.03922t. Using only the trend equation, develop forecast for the 12 hours for July 18. c. Using the seasonal indexes from part (a) to adjust the trend forecasts in part (b).
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