Question

A quality control manger 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

A. Testing the first 2000 light bulbs in the production line
B. Testing the last 4000 bulbs in the production line
C. Retesting 100 light bulbs that have already been tested
D. Testing every fiftieth light bulb in the production line

Answer 1

[AI-generated answer — Bot GPT 3.5]

D. Testing every fiftieth light bulb in the production line

This method would most likely lead to a valid inference because it involves systematic random sampling, where every fiftieth light bulb is selected for testing. This helps to ensure that the sample is representative of the entire production line, rather than being biased towards one end or the other.