Slight indication of an increase

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Reference no: EM131798493

While U.S. inventory levels remain low, there is a slight indication of an increase in the U.S. business inventory-to-sales ratio, due to higher sales (The Wall Street Journal, December 15, 2010). The accompanying table shows a portion of seasonally adjusted inventory to-sales ratios from January 2008 to October 2010; the full data set can be found on the text website, labeled Inventory-to-Sales.

1589_labeled Inventory-to-Sales.png

a. Plot the above series. Which polynomial trend model do you think is most appropriate?

b. Verify your answer by formally comparing the linear, quadratic, and cubic trend models.

c. Make a forecast for the inventory-to-sales ratio for November and December of 2010.

Reference no: EM131798493

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