750 Statistics For Economists Q.10.43 (a) Obtain the seasonal indices for the following data by using link relative method: Quarters Years II III IV 1948 71 89 106 78 1949 71 90 108 79 1950 73 91 111 81 1951 76 97 122 89 (b) Also obtain the seasonal indices by the ratio to trend method and by fitting the least squares trend line to the Annual Averages. Q.10.44 (a) Find seasonal indices by link relative method. Years Quarters II III IV 1990 83 81 98 114 1991 124 113 115 152 1992 163 162 168 175 1993 191 180 184 197 (b) Find S.I. by ratio to moving average method. (C) Find S.I. by ratio to trend method. Q.10.45 (a) What is meant by seasonal variation? How will you separate it from the time series data? (b) What is meant by deseasonalization of time series