Final answer:
This question is about statistics. Without specific historical data or context provided in the question, a definitive comparison between the mean number of children birthed by first ladies and women of that time can't be made. A hypothetical scenario suggests the first ladies might birth fewer children compared to the average woman of their time, based on fertility rates in different countries.
Step-by-step explanation:
Comparing the mean number of children birthed by first ladies to women of a certain period depends on the historical data available for the specific period in question. However, without such data or other context provided in the question, it is hard to provide a definitive answer. A statistical analysis can be performed if the mean number of children birthed by the first ladies and women of this period is provided.
For example, a hypothetical comparison considering the fertility rate in different countries which seemed to be mentioned in the reference, such as the rate in China which went down from 5.91 in 1966 to 1.6, can be made. Taking these numbers into account and assuming the first ladies fall into this demographic, if the mean number of children birthed by the first ladies was, say, 2, it would be less than the average 7 to 8 children women birthed around that time.
Please note that this is entirely hypothetical and should not be taken as a factual statement.
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