How does this forecast differ from that using employment as the independent variable? What is the coefficient of determination for this scenario and what does it imply?

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Chapter2: Introduction To Spreadsheet Modeling
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Using data in the below in class example, forecast GA operations using effective buying income (X2) as the independent variable. Develop forecasts for the years 2010, 2015, 2020 and 2030. Show your answers in a table.

Questions:

  • How does this forecast differ from that using employment as the independent variable?
  • What is the coefficient of determination for this scenario and what does it imply?

 

 

 

Service Area

Year

GA Operations (Y)

Employment (X1)

Effective Buying Income (X2)

2000

22,513

45,714

$8,433

2001

23,768

48,601

$9,207

2002

21,838

51,314

$10,106

2003

25,904

54,107

$10,457

2004

26,208

57,848

$11,055

2005

26,946

56,022

$11,016

2006

27,977

56,317

$11,399

2007

27,294

58,757

$11,883

2008

28,647

61,556

$12,119

2009

29,270

62,341

$12,213

Forecast

2010

 

66,533

$13,081

2015

 

73,491

$14,609

2020

 

82,189

$16,525

2030

 

99,584

$20,369

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