Nonprobability sample does given procedure represent

Reference no: EM131403849

1. In survey research, what are some of the methods by which we can reduce nonsampling error?

2. Attendees at an industrial trade show are given the opportunity to fill out a card that entitles them to receive a free software package from the sponsoring firm. The cards are placed in a bin, and 30 winners will be drawn. Considering the 30 winners as a sample from all of the persons filling out such cards, is this a probability sample or a nonprobability sample? What specific type of probability or nonprobability sample does this procedure represent?

Reference no: EM131403849

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