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.节点对象是整个DOM中最主要的数据类型。用Secondary da...
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...
3、Design: It is a multi-stage cross-sectional survey and a secondary data analysis.研究设计：采用多阶段抽样的横断性调查。属于二手资料分析。4、With a secondary data source, users cannot save the data they enter into the form to use offline.使用辅助数据源，用户无法保存他们在表单中...
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...
和Secondary data不同,初级研究是对Primary data进行分析的方法。所谓Primary data,指的是和二手资料或次级资料不同的、研究者亲自采集的资料。在严肃的学术性研究中,初级研究因为数据的原始性、客观性和直接性备受研究者关注。从某种意义上说,初级数据才是科学研究最可靠的数据。因为初级数据是基于研究者本人的亲身经历...
[translate] aample 正在翻译,请等待... [translate] aHello this is: 你好这是: [translate] asomething to eat 某事吃 [translate] abe late for school 为学校是晚 [translate] aInspection Equipment Rules 检查设备规则 [translate] aprimary data and secondary data 主要数据和二次数据 [translate] ...
Avoid reinventing the wheel. Explore secondary data sources before you start a primary research project. You may find what you're looking for and need not go any further. Consult with the reference librarian at the main branch of your public library. Reference librarians usually know what ...
The key differences between primary and secondary storage can be summarized as follows: Speed of access: Primary storage, often directly connected to the computer's processor, boasts rapid data retrieval speeds. In contrast, secondary storage, designed for long-term storage, typically has slower acce...
ainequity and inefficiency. The analysis is based on primary and secondary data sources 不公平和无效用。 分析根据主要和次要数据来源[translate]
The sample size from which primary data was collected must be similar to any other sample size on which secondary data is to be used on. Caution should be taken to make sure that secondary data been used is accurate and has not been filtered, inflated or deflated. ...