A group of people who, in response to some general appeal, have selected themselves to participate in a survey is called a simple random sample.

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A simple random sample is a sample selected randomly from the population of interest, without any preference or bias towards certain individuals or groups. Therefore, it is not a group of people who have selected themselves to participate in a survey. A group of people who voluntarily choose to participate in a survey is called a voluntary response sample or a self-selected sample, which is generally not representative of the population and can lead to biased results.

A Group of People Who, in Response to Some General