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(a) Use MegaStat or MINITAB to deseasonalize the monthly Corvette sales data and fit a tre...

(a) Use MegaStat or MINITAB to deseasonalize the monthly Corvette sales data and fit a trend. Interpret the results. (b) Use MegaStat or MINITAB to perform a regression using seasonal binaries. Interpret the results. (c) Use the regression equation to make a prediction for each month in 2004. (d) If you have access to Ward’s Automotive Yearbook. 2005 (67th edition), check your forecasts. How accurate were they?  Corvette

U.S. Corvette Sales, 2000-2004 (number of cars sold)

Month

2000

2001

2002

2003

Jan

1,863

2,252

2,443

1,468

Feb

2,765

2,766

3,354

1,724

Mar

3,440

2,923

1,877

2,792

Apr

3,018

2,713

2,176

6,249

May

2,725

2,847

3,049

2,441

Jun

2,538

2,521

2,708

2,272

Jul

1,598

2,000

2,960

2,007

Aug

2,861

2,789

2,912

2,107

Sep

2,942

3,639

2,960

1,615

Oct

2,748

4,647

3,094

1,878

Nov

2,376

2,910

2,163

1,596

Dec

2,334

1,648

2,859

1,825

Total

31,208

33,655

32,555

27,974

Source: Ward’s Automotive Yearbook. 2001- 2004.

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