The Boxer Company Has Been in Business Since 1998

Multiple Choice

The Boxer Company has been in business since 1998. The following sales data are recorded by quarter for the years 2010-2012. The managers at the company wish to determine the seasonal indexes for each quarter during the year. The first step in the process is to remove the seasonal and random components. To do this, they will begin by computing a four-period moving average. They then compute the centered moving average. What is the next step in applying the multiplicative model?

A) Compute the grand mean
B) Divide the centered moving average by the forecasted value
C) Compute the ratio-to-moving average value
D) Normalize the data