In addition to his day job as an engineer, Luis Garcia runs a small ethnic grocery store. The shop stocks food items from southeast Asian countries and caters to the large population of people from this region who live in Luis’s community. Luis wants to develop a quantitative model to forecast sales. His sales data (in thousands) for the past 16 quarters are provided in the Excel Data File on the tab labeled “GARCIA”

Development  of mulitiplicative model

Briefly explain the technique

Forecast for revenues for year 5

Graph the actual and unseasonalized sales (two lines in the same   graph with time on the X axis)

Discussion of validity of model using summary measures


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