Probability Sample Vs. Nonprobability Sample

Describe the differences between a probability sample and a nonprobability sample

A probability sample collects and aggregates data is a way that is completely unbiased and not affected by subjective assumptions of the researchers. A true probability sample of American adults will give each of the estimated 242,500,200 adults living in this country an equal chance of being used as a data point for the study. This is more effective for research where the data is non-specialized and can be applied to a population without adjustment. A nonprobability study eliminates certain members of the population based on the parameters set by the researchers. For instance, a researcher may decide that only Americans with the last name Smith will be used in this study, thus making it a nonprobability study of the entire population.

  • Student: Barbara Catalina
  • Textbook: Statistics
  • Course: QNT 351

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