use the trend equation to calculate the points for 2003, Ask an Expert

Statistics

The sales, in billions of Keller Overhead Door, Inc for 2001 to 2006 are:

Year	sales
2001	7.45
2002	7.83
2003	8.07
2004	7.94
2005	7.76
2006	7.90

a. Plot the data

b. Determine the least squares trend equation

c. Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.

d. Estimate the net sales for 2009.

e. By how much have sales increased (or decreased) per year on the average during the period?

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Statistics and Probability, Statistics

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