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1- Nelson Industries manufactures a part for a type of aircraft engine that is becoming obsolete....

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Statistics

1- Nelson Industries manufactures a part for a type of aircraftengine that is becoming obsolete. The sales history for the last 10years is as follows:

year    sales

Dec-98 945

Dec-99 875

Dec-00 760

Dec-01 690

Dec-02 545

Dec-03 420

Dec-04 305

Dec-05 285

Dec-06 250

Dec-07 210

  1. Estimate the regression model for a linear time trend ofsales.
  2. What is the root-mean-squared error of the linear regressionestimates for these 10 years?
  3. Using this model, estimate sales for year 11.

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1 Nelson Industries manufactures a part for a type of aircraftengine that is becoming obsolete The sales history for the last 10years is as followsyear salesDec98 945Dec99 875Dec00    See Answer
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