The quarterly sales (in thousands of copies) for a specific educational software over the past three years are given in the following table.

a.Compute the four seasonal factors (Seasonal Indexes). Show all of your computations.
b.The trend for these data is Trend = 174 + 4 t (t represents time, where t=1 for Quarter 1 of 2003 and t=12 for Quarter 4 of 2005). Forecast sales for the first quarter of 2006 using the trend and seasonal indexes. Show all of your computations.

Question

The quarterly sales (in thousands of copies) for a specific educational software over the past three years are given in the following table.
  
a.Compute the four seasonal factors (Seasonal Indexes). Show all of your computations.
b.The trend for these data is Trend = 174 + 4 t (t represents time, where t=1 for Quarter 1 of 2003 and t=12 for Quarter 4 of 2005). Forecast sales for the first quarter of 2006 using the trend and seasonal indexes. Show all of your computations.

Quizplus · Accepted Answer

The Answer of The quarterly sales (in thousands of copies) for a specific educational software over the past three years are given in the following table.
  
a.Compute the four seasonal factors (Seasonal Indexes). Show all of your computations.
b.The trend for these data is Trend = 174 + 4 t (t represents time, where t=1 for Quarter 1 of 2003 and t=12 for Quarter 4 of 2005). Forecast sales for the first quarter of 2006 using the trend and seasonal indexes. Show all of your computations.

The Quarterly Sales (In Thousands of Copies) for a Specific