A quality control manager wants to determine the percentage of defective light bulbs in the production line. Which of the following sampling methods would most likely lead to a valid inference? (1 point)

Question

A quality control manager wants to determine the percentage of defective light bulbs in the production line. Which of the following sampling methods would most likely lead to a valid inference? (1 point)

• retesting 100 light bulbs that have already been tested
• testing the last 4,000 bulbs in the production line
• testing every fiftieth light bulb in the production line
• testing the first 2,000 light bulbs in the production line

Answer 1

Testing every fiftieth light bulb in the production line would most likely lead to a valid inference. This method ensures a random and representative sample of the entire production line, increasing the likelihood of capturing the true percentage of defective light bulbs. The other options may introduce bias or not provide a representative sample of the entire production line.