Using the index (1985=100) on housing starts in the United States per year from 1986 to 1997 given in the table below, forecast the index for 1998 a three-year and a five year moving average. Which of your estimates is better if the actual index of housing starts in the United States for 1998 is 163?
Index of Housing Starts (1985 = 100)
1986 116
1987 122
1988 121
1989 121
1990 111
1991 97
1992 113
1993 125
1994 146
1995 142
1996 156
1997 162