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DSST Principles of Statistics Exam Prep

Category - DSST Statistics Free Test Prep

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Quality control at a software production assembly line chooses samples for study from every 25 units produced within the day shift. At the end of a single production cycle, they are expected to analyze 200 units for defects. What is this type of sampling called?

  1. probability
  2. non-probability
  3. convenience
  4. judgment
Explanation

Answer: A - Probability sampling is a sampling methodology whereby an item is chosen based on a known probability.

Key Takeaway: Probability sampling means that participants or items in a sample are chosen out of the population according to some known probability. These probabilities can range from simple to more complicated ways to choose sample participants or items out of a population. In this example, a product has a 1/25 chance of being chosen for quality control.

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