Question

In: Statistics and Probability

Number of U.S. New Car Dealerships, 2003–2009 Year Dealerships 2003 21,725 2004 21,650 2005 21,640 2006...

Number of U.S. New Car Dealerships, 2003–2009
Year	Dealerships
2003	21,725
2004	21,650
2005	21,640
2006	21,495
2007	20,770
2008	20,010
2009	18,460

(a)

Use Excel, MegaStat, or MINITAB to fit three trends (linear, quadratic, exponential) to the time series. (A negative value should be indicated by a minus sign. Do not round the intermediate calculations.Round your final answers to 4 decimal places.)

FILL IN "_____" IN LINEAR AND QUADRATIC


Linear	y_t = -498.035t + ____
Quadratic	y_t = -146.25t² + 671.96t + _____
Exponential	y_t = 22934e ^-.025t

(b-1)

Use each of the three fitted trend equations to make numerical forecasts for the next 3 years. (Do not round the intermediate calculations.Round your final answers to 1 decimal place.)

FILL IN EXPONENTIAL

t	Linear	Quadratic	Exponential
8	18829.3	17074.3
9	18331.3	15260.0
10	17833.2	13153.2

Expert Solution

Lets do it in excel ,

so the regression equation for linear is Y = 22813.57 - 498.035*Time

simillarly we fit the equation for quadratic and exponential as

the equation is Y = exp(-2.976) + 21558.55

Alright Dude, If that worked for you... don't forget to give THUMBS UP.(that will work for me!)

orchestra answered 2 years ago

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