抽样调查 (chōuyàng diàochá): This term means sampling survey. It involves selecting a representative group from a larger population for research purposes.
统计数据 (tǒngjì shùjù): This term refers to statistical data, which is collected and analyzed to provide information about a specific topic or situation.
数据分析 (shùjù fēnxī): This term means data analysis. It involves examining and interpreting data to identify patterns, trends, and insights.