18. Given below are 2 years of quarterly demand data for a particular model of personal computer from a local computer store.

a. Deseasonalize the data with a moving average, and compute a linear regression equation for the trend in demand.

b. Compute an average multiplicative index for each of the four quarters of a year.

c. Using the trend and seasonal indices you have developed, compute a forecast for the demand in each of the quarters of the following year.

Transcribed Image Text:

QUARTER YEAR I YEAR 2 QUARTER YEAR I YEAR 2 40 44 3 39 43 2 46 57 4. 42 45