Is the trend of decreasing difference in age at first marriage as seen in the last problem stronger now? Only the data values from 1950 to 2000 were included in this new data set. According to the remaining data values, with the nine observations from 1890 to 1950 deleted, what can you now say about the linear regression analysis of the difference in ages at time of marriage over the last 50 years? In the year 0 A.C.E., the estimated expected difference in marital age is ______________ years