Statistics - Time Series Projects

Although you should not expect a perfectly fitting model for any time-series data, you can consider the

Problem: Although you should not expect a perfectly fitting model for any time-series data, you can consider the first differences, second differences, and percentage differences for a given series as guides in choosing an appropriate model. For this problem, use each of the time series presented in the following table:

Year	Coded Year	Series I	Series II	Series III
2000	0	10	30	60
2001	1	15.1	33.1	67.9
2002	2	24	36.4	76.1
2003	3	36.7	39.9	84
2004	4	53.8	43.9	92.2
2005	5	74.8	48.2	100
2006	6	100	53.2	108
2007	7	129.2	58.2	115.8
2008	8	162.4	64.5	124.1
2009	9	199	70.7	132