The estimator of 
used in the inference regarding the ratio of two population variances is 
.
Definitions:
Exponential Growth
A growth pattern in which the rate of growth is proportional to the current size, resulting in a rapid increase over time.
Survivorship
The percentage of members of a group that are likely to survive to any given age.
Age Structure Diagram
A graphical representation showing the distribution of a population by age and sex, which helps to predict population growth trends.
Developed Country
A country with a highly developed economy and advanced technological infrastructure relative to other less industrialized nations.
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