Assume we have the following time series data on variable Y below: YEAR/Time Y=Output 1953 482 1954
Question:
Assume we have the following time series data on variable Y below:
YEAR/Time Y=Output
1953 482
1954 312
1955 1221
1956 1800
1957 2419
1958 2958
1959 3454
1960 3897
1961 4317
1962 4705
1963 5056
1964 5378
1965 5681
1966 5964
1967 6216
1968 6425
1969 6632
1970 6836
1971 7003
1972 7170
1973 7315
1974 7456
1975 7595
1976 7715
1977 7815
1978 7918
1979 7995
1980 8079
1981 8164
1982 8239
1983 8292
1984 8355
1985 8402
1986 8461
1987 8493
1988 8539
1989 8561
1990 8609
1991 8649
1992 8660
1993 8680
1994 8726
1995 8740
1996 8760
1997 8783
1998 8805
1999 8812
2000 8854
2001 8841
2002 8869
2003 8893
2004 8883
2005 8888
2006 8904
2007 8913
2008 8913
2009 8923
2010 8948
2011 8962
a) Fit a simple trend model to the time series data and discuss the findings.
b) Fit a quadratic trend model to the time series and discuss the findings: (square time).
c) Compare your results in part (b) to part (a) and use the best of the two models to forecast 2012 and 2013 values of Y.
Accounting Information Systems
ISBN: 978-0133428537
13th edition
Authors: Marshall B. Romney, Paul J. Steinbart