Determine the trend for the data in Problem 15.32 using the deseasonalized data from Problem 15.33. Explore both a linear and a quadratic model in an attempt to develop the better trend model.

in Problem 15.32.

Chemicals
and Allied
Products
Time Period ($ billion)
January (year 5) ........28.931
February ...........30.456
March ............32.372
April ..............30.905
May ............30.743
June ............32.794
July .............29.342
August ...........30.765
September ...........31.637
October ............30.206
November ..........30.842
December..........31.090

Transcribed Image Text:

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