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)
A. testing the first 2,000 light bulbs in the production line
B. testing the last 4,000 bulbs in the production line
C. testing every fiftieth light bulb in the production line
D. retesting 100 light bulbs that have already been tested
C. testing every fiftieth light bulb in the production line
C. testing every fiftieth light bulb in the production line.
This sampling method would most likely lead to a valid inference because it ensures that a representative sample is obtained from the entire production line. By testing every fiftieth light bulb, the quality control manager can cover a wide range of light bulbs produced without introducing bias in the selection process. This method allows for a systematic sampling approach, increasing the likelihood of obtaining reliable and accurate results for determining the percentage of defective light bulbs in the production line.