[Solved] The sales, billion of dollars, of Keller Overhead Door, Inc. for 1995 t o2000 are: Year t Sales, $ billion 1995 1 7.45 1996 2 7.83 1997 3 8.07

Question:

The sales, billion of dollars, of Keller Overhead Door, Inc. for 1995 t o2000 are:

Year	t	Sales, $ billion
1995	1	7.45
1996	2	7.83
1997	3	8.07
1998	4	7.94
1999	5	7.76
2000	6	7.90

Plot the data

Determine the least squares trend equation.

	Coefficients	Standard Error	t Stat	P-value	Lower 95%	Upper 95%
Intercept	7.634	0.192840423	39.58714	2.43E-06	7.098588	8.169412
t	0.05457	0.049516849	1.102078	0.33228	-0.08291	0.192053

This means that the regression equation is
\[Sales=7.634+0.05457t\]

Use the trend equation to calculate the point for 1997 and 1999. Plot them on the graph and draw regression line.
Estimate the net sales for 2003.
By how much sales increased (or decreased) per year on the average during the period?

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[Solved] The sales, billion of dollars, of Keller Overhead Door, Inc. for 1995 t o2000 are: Year t Sales, $ billion 1995 1 7.45 1996 2 7.83 1997 3 8.07

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