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The state of Texas has reported the following quarterly gross sales for the in-state accommodation and food services industry for the years 2004-2008.

Source: Texas Comptroller of Public Accounts site, ecpa.cpa.tx.us, August  22, 2009.

Gross Sales ($ Billions)

 

I

II

III

IV

2004

$7.014

7.330

7.260

7.521

2005

7.441

7.904

7.716

8.228

2006

8.166

8.390

8.321

8.751

2007

8.642

9.322

9.136

9.599

2008

9.412

9.879

9.578

9.995

a. Construct the four-quarter centered moving average for these data and determine the percentages of the moving average for the quarters.

b. Determine the seasonal indexes for the quarters.

c. Use the seasonal indexes to deseasonalize the original time series.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M91704315

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