Posted by **Anonymous** on Sunday, October 2, 2011 at 9:12pm.

The following data on the number of iron workers in the United States for the years 1978 through 2008 are provided by the U.S. Bureau of Labor Statistics. Using regression techniques discussed in this section, analyze the data for trend. Develop a scatter plot of the data and fit the trend line through the data. Discuss the strength of the model.

Year

Union members

(1000’s)

1978

17,340

1979

16,996

1980

16.975

1981

16.913

1982

17,002

1983

16,960

1984

16,740

1985

16.568

1986

16,390

1987

16,598

1988

16,748

1989

16,360

1990

16.269

1991

16,110

1992

16,211

1993

16,477

1994

16,334

1995

16,305

1996

16,145

1997

15,776

1998

15,472

1999

16,685

2000

15,359

2001

16,670

2002

16,098

2003

16,212

2004

16,316

2005

16,718

2006

16,707

2007

16,113

2008

15,128

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