random sampling

音標(biāo)發(fā)音

Methods:The peasant-workers were random-sampling surveyed by SCL-90 and SWLS.
方法：采用SCL-90量表和SWLS量表進(jìn)行隨機(jī)抽樣調(diào)查。
Methods Using the same protocol and questionnaire, performing cluster-random-sampling survey for the population aged over 40 years in Liwang district of Guangzhou.
方法采用統(tǒng)一調(diào)查表格，以整群隨機(jī)抽樣方法，調(diào)查年齡在40歲以上的人群，并進(jìn)行肺通氣功能檢測。
By using the simple random-sampling method, this paper researches on the influence of the mark plants before the entry point of superhighway's ramp on the responding time of the driver.
采用簡單隨機(jī)取樣法，研究了高速公路匝道入口前的標(biāo)志植物對駕駛員反應(yīng)時間的影響。

MessageLabs, the email-filtering company that Symantec acquired in 2008, posted a set of word maps today measuring the frequency of terms in spam emails from a random one-week sampling of junk mail pulled from the most prolific spam-spewing botnets.
FORBES: The Most Common Words In Spam Email
Public-health officials already conduct random sampling, so getting the participants to name a few friends too should not be onerous.
ECONOMIST: Epidemiology: Infectious personalities The

the process of choosing items to test without using any pattern as to how they are chosen