Examlex
Stratified random sampling involves selecting a simple random sample from each of a given number of subpopulations, called strata.
Net Exports
The value of a country's total exports minus the value of its total imports.
Trade Surplus
The amount by which the value of a country's exports exceeds the cost of its imports.
Exports
Goods or services sold by one country to another, contributing to the selling country's gross domestic product.
Imports
Products or services imported into a country from abroad for the purpose of selling.
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