Consider this data on the median age of U.S. women who married for the first time in these years between 1972 and 1990. Approximately 0.08% of Americans get married each year.

a. Create a scatter plot of this data. Do these data seem linear?
b. Find a median-median line for the data.
c. Use your median-median line to predict the median age of women at first marriage in 2000.
d. Use your median-median line to make a prediction for the year 2100. Does your prediction seem reasonable?
e. Calculate the residuals for each data point, and find the root mean square for your equation. What does this tell you about your model?

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Women's Median Age at First Marriage Age Year 197220.5 1974 20.6 1976 21.0 1986 23.3 Year Age 1982 22.3 1984 | 22.8 1978 21.4 1988 23.7 1980 218 1990 24.0 (Centers for Disease Coutrol and Prevention National Center for Health Statistics)