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)

Responses

retesting 100 light bulbs that have already been tested
retesting 100 light bulbs that have already been tested
testing every fiftieth light bulb in the production line
testing every fiftieth light bulb in the production line
testing the first 2,000 light bulbs in the production line
testing the first 2,000 light bulbs in the production line
testing the last 4,000 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 of sampling allows for a representative sample of the entire production line without bias towards certain sections of the line.