Question: The following table shows the number of persons covered by private health insurance for hospital and surgical benefits for 1990 through 2002.

Year # of Year # of Year # of

1990 121 1995 145 2000 167

1991 126 1996 148 2001 174

1992 130 1997 151 2002 175

1993 134 1998 156

1994 139 1999 161

a. Plot the original data.

b. Determine the trend equation and graph the trend line

c. Compute Y_c for each year

d. Using the above data, compute the exponential smoothing, using a smoothing coefficient of 0.3.