Multiple choice Is there evidence that the age at which wome

Multiple choice.

Is there evidence that the age at which women get married has changed over the past 100 years? The accompanying scatterplot shows the trend in age at first marriage for women. Complete parts a through d below.

Solution

We do all these by inspection, so we cannot really explain it better other than by looking at the graph.

a) OPTION D. It explains itself.

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b)

OPTION A. The association appears relatively strong.
[There is obviously a ternd everywhere, although it is irregular.]

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c)

OPTION B. No, as a whole, the graph is clearly nonlinear.

[We take it as a whole from 1900 to 2020]

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d)

OPTION B. No, a linear model would not be appropriate, although one could fit a linear model to the period from 1975 to 2003. [It is linear on that part, and has many data points.]