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(Solved) Sales of roof material , by quarter, for 2007 through 2013, by


Sales of roof material, by quarter, for 2007 through 2013, by Carolina Home Construction Inc. are shown below (in $000).

 

    Quarter  
 
  Year I II III IV
  2007 218 187   62     245  
  2008 216 218   85     236  
  2009 247 224   91     289  
  2010 251 253   117     294  
  2011 272 265   114     304  
  2012 304 293   114     315  
  2013 321 293   128     325  


 

a.

Determine the typical seasonal patterns for sales using the ratio-to-moving-average method. (Round your answers to 4 decimal places.)

 

Seasonal Index by Quarter
Quarter Seasonal Index
1    
2    
3    
4    

 

b.

Deseasonalize the data and determine the trend equation. (Round your answers to 3 decimal places.)


 

   =  +  t

 

c.

Project sales for 2014 using the trend equation and seasonally adjust these values to find the predicted sales for each quarter. (Round your answers to 4 decimal places.)

 

Period Forecast
29   
30   
31   
32   


 


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Oct 15, 2019

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