primary data是主要数据，secondary data是次要数据。用Primary data举例子：separate the primary data and indices to that data.他们的解决方案是把主要数据和这些数据的索引分离开来。The Node object is the primary data type for the entire DOM.节点
1、separate the primary data and indices to that data.他们的解决方案是把主要数据和这些数据的索引分离开来。2、The Node object is the primary data type for the entire DOM.节点对象是整个DOM中最主要的数据类型。3、You design it by selecting a number of primary data records from the ...
Primary and Secondary data-主要和次要数据 Primary and Secondary data-主要和次要数据 Primary dataare data collected especially/particularly for a specific purpose. Secondary dataare data which have already been collected elsewhere, for some other purpose, but which can be used or adapted for the surv...
Primary data is original data collected firsthand for a specific research purpose, while secondary data is existing data collected by others for different purposes. 首先确定问题完整且不包含需要舍弃的情况。初级数据(primary data)指研究者亲自收集的第一手数据,如通过调查问卷、实验或观察获得,针对性解决当...
Today’scoursestructures:Firstclass:taughtcourseDatasources:1.Secondarydata2.PrimarydataSecondclass:discussingwithyouaboutyourresearchtopicandresearchproblems(questions)2 Lecture5Datasources Purposeofthischapter:a.Thedefinitionofsecondaryandprimary datab.Whatwemeanbydatacollectionc.Whatthesourcesofdatacollectiond...
Scientists of every specialty, from sociology to astronomy, employ various research methods for data collection. Data are placed into two categories -- primary and secondary -- depending on who gathered the research.Explore this article1 Primary Data If you survey your classmates and ask them to...
一手数据（Primary data）：也称原始数据。指通过人员访谈、询问、问卷、测定等方式直截获得的，时效性和相关性更好。二手数据（Secondary data）：利用文献，统计年报以及数据库等前人统计好的数据资料。优点是获取成本低，且现成可用。一般可以长时间保存，生成数据趋势图方便。一手数据提能够提供量身定制的...
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Secondary data needs to be analyzed to ensure the credibility and applicability of these data to a subject, situation, or project. Learn about the definition of secondary data analysis and check out the given examples. Related to this Question ...
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