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

Responses

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

retesting 100 light bulbs that have already been tested
retesting 100 light bulbs that have already been tested

testing the first 2,000 light bulbs in the production line

Answer 1

The sampling method that would most likely lead to a valid inference about the percentage of defective light bulbs in the production line is:

testing every fiftieth light bulb in the production line.

This method is systematic and provides a random sample over the entire production of light bulbs, which helps reduce bias and gives a more accurate representation of the entire population of light bulbs produced. The other methods are more prone to bias and may not represent the overall quality effectively.