=+42. Age at first marriage 2011, part 3. Has the trend of decreasing difference in age at first marriage seen in Exercise 40 gotten stronger recently? Here are the scatterplot and residual plot for the data from 1975 through 2011, along with a regression for just those years.

2.50 2.75 2.25 2.00 1.75 Men’s Age –

Women’s Age

(years)

1980 1990 Year 2000 2010 0.4 0.2 0.0 Residuals

–0.2 1.95 2.10 2.25 2.40 Predicted (M–W)

Dependent variable is: Men – Women R-squared = 51.9% s = 0.2143 Variable Coeff Intercept 42.5662 Year -0.0203