Two teaching experiments were conducted and a big-sample questionnaire was carried out to test its efficiency.

在实践中进行了两次教学实验，同时进行了大样本的问卷调查，检验其效度。

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METHODS: Random sample questionnaire survey was conducted among consumers in Baoding city and its surrounding counties, and the data were subjected tot-test, analysis of variance, and LSD-t test.

方法：对保定市及周边县城消费者进行随机抽样问卷调查，采用t检验、方差分析和LSD - t检验等方法对调查数据进行统计学处理。

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It allows you to briefly sample data and then asks you to fill out a questionnaire about a recent or current job, including your compensation.

FORBES: How To Know What That Job Pays