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 testing the first 2,000 light bulbs in the production line testing the first 2,000 light bulbs in the production line retesting 100 light bulbs that have already been tested retesting 100 light bulbs that have already been tested testing the last 4,000 bulbs in the production line testing the last 4,000 bulbs in the production line testing every fiftieth light bulb in the production line
Testing every fiftieth light bulb in the production line would be the best sampling method to lead to a valid inference. This method ensures that a representative sample of the entire production line is being tested, reducing the risk of bias in the results. Testing only the first 2,000 or last 4,000 bulbs may not represent the entire population of light bulbs being produced. Retesting light bulbs that have already been tested may not provide new information about the overall quality of the production line.
