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Nelson Industries manufactures a part for a type of aircraft engine that is becoming obsolete. The sales history for the last 10 years is as
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Nelson Industries manufactures a part for a type of aircraft engine that is becoming obsolete. The sales history for the last 10 years is as follows:
(c4p9) Year Sales 2008 945 2009 875 2010 760 2011 690 2012 545 2033 420 2014 305 2015 285 2016 250 2017 210 -
Plot sales versus time.
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Estimate the regression model for a linear time trend of sales.
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What is the mean absolute percent error of the linear regression estimates for these 10 years?
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Using this model, estimate sales for year 11.
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Please solve using forecast x or Excel so I can figure out what I am doing wrong
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