Question

Marriage Age vs Number of Children Using the Gapminder software (https://www.gapminder .org/tools), set the vertical axis to Age at 1st marriage (women) and the horizontal axis to Babies per woman. This scatterplot shows the mean age at which woman marry, and the mean number of children they have, for various countries. Click the play icon and observe how the scatterplot changes over time, then answer the following questions: (a) Overall, is there a positive or negative association between \(A\) ge at 1 st marriage and Babies per woman? (b) Describe what happens to the number of babies per woman, and age at 1 st marriage, between 1941 and 1943 in Russia (at the height of World War II). (c) Describe what happens to the number of babies per woman, and the age at 1st marriage, in Libya from 1973 to 2005 .

Short answer

This cannot be definitively answered as the exact plot interpretation will depend on the scatterplot displayed at the time of the exercise. However, a general guide is: (a) Positivity or negativity of association will depend on the upward or downward trend seen in the scatter. (b) & (c) The changes in 'Age at 1st Marriage' and 'Babies per Woman' between the specified years for Russia and Libya respectively will be interpreted from the specific data points' motion.

Step-by-step solution

Run Gapminder

Navigate to the Gapminder website and run the tool. Set the vertical axis to 'Age at 1st marriage (women)' and the horizontal axis to 'Babies per woman'.

Observe the Scatterplot

Run the scatterplot over time by clicking on the play icon. Observe the motion of data points and their relative positions

Determine the overall association

From the scatterplot, observe whether there is a positive or negative association between the two variables. This will be seen as the general trend of the scatter points - upwards for a positive association and downwards for a negative one.

Analyze Marriage Age and Babies per woman in Russia between 1941 and 1943

Zoom into the years between 1941 and 1943 and analyze Russia's point. Observe the movement and determine the changes in age at 1st marriage and number of babies per woman.

Analyze Marriage Age and Babies per woman in Libya between 1973 and 2005

Zoom into the years between 1973 and 2005 and analyze Libya's point. Observe the movement and determine the changes in age at 1st marriage and number of babies per woman.