In telephone surveys, a technique for creating a probability sample by randomly generating telephone numbers. By using this method, all numbers (including unlisted) have an equal chance of being called.

• 在电话调查中使用的一种方法,它以随机产生的电话号码作为随机抽样的样本。通过这种方法,使所有号码(包括未被列入电话号码簿的电话号码)都有同等的被抽样的机会。