Final answer:
Accurate current population data, understanding birth and death rates, and historical population data are crucial factors for predicting the future size of a population accurately.
Step-by-step explanation:
The accuracy of predicting the future size of a population is a complex endeavor that depends on various factors. Accurate current population data is crucial as a baseline, as well as understanding birth and death rates and accounting for migration patterns. Socio-economic and healthcare data can provide insights into potential changes in these rates. Historical population data is a crucial factor for predicting the future size of a population accurately.