In Exercise we looked at the age at which women married as one of the variables considered
Question:
Clearly, the pattern for men is similar to the pattern for women. But are the two lines getting closer together? Here is a time plot showing the difference in average age (mens age womens age) at first marriage, the regression analysis, and the associated residuals plot.
a) What is the correlation between Age Difference and Year?
b) Interpret the slope of this line.
c) Predict the average age difference in 2020.
d) Compute the Durbin- Watson statistic and comment.
e) Describe reasons why you might not place much faith in that prediction.
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Related Book For
Business Statistics
ISBN: 9780321925831
3rd Edition
Authors: Norean Sharpe, Richard Veaux, Paul Velleman
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