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问卷是用来收集资料的一种研究工具。()

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Physical distance can affect / how well people communicate. The farther away one person is from another, the less often they communicate. Some research has shown / that when the distance is more than 10 meters, the probability of communicating / at least once a week is only 8%. The most important thing for all managers to remember / is that communication is a two-way process. They should encourage their employees to ask questions / and to react to what the managers are saying. /
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点二列适用于检验二分名义变量与连续变量之间的相关。()

假设是有科学依据的假定性看法。()

将“青少年”界定为“ 7岁以上18岁以下的人”，这种定义方法是概念性定义。()