Secondary data is data collected by others, used for these purposes may be different from the purpose of our study. Secondary data can be processed raw data (also known as raw data), or data processing. Thus, secondary data research not directly by the collection. There are many researchers, students underestimated secondary data sources available. So we begin to consider the reasonableness of the secondary data source for research issues before proceeding we gather our own data. The survey on population, housing, business surveys, surveys of living standard, socio-economic survey families (multi-purpose) ... because the government requires that the data sources are important for social and economic research.
đang được dịch, vui lòng đợi..
