Question

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

[AI-generated answer — Bot GPT 3.5]

The correct sampling method that would most likely lead to a valid inference is testing every fiftieth light bulb in the production line. This method ensures a systematic and random sampling approach, which can provide a representative sample of the entire production line. Testing all of the first 2,000 or last 4,000 bulbs may introduce bias and may not be reflective of the entire production process. Retesting 100 light bulbs that have already been tested would not provide new information on the percentage of defective light bulbs.