एक व्यापक जनसंख्या जनगणना से निम्नलिखित में से किस जनसांख्यिकीय पैरामीटर को समझा जा सकता है?

In traditional anthropological classification of human races, which racial group was characterized as 'yellow-skinned'?

What is the approximate estimated proportion of ecumene (habitable) and non-ecumene (uninhabitable/sparsely inhabited) areas on the Earth's surface?