a quality control manager wants to determine the percentage of defective light bulbs in the production line

Answer 1

To determine the percentage of defective light bulbs, the quality control manager can follow these steps:

1. Select a random sample of light bulbs from the production line.
2. Inspect each light bulb in the sample for defects such as flickering, dimness, or broken glass.
3. Record the number of defective light bulbs in the sample.
4. Calculate the percentage of defective light bulbs by dividing the number of defective light bulbs by the total number of light bulbs in the sample and multiplying by 100.

For example, if the quality control manager inspects 100 light bulbs in the sample and finds 10 defective light bulbs, the percentage of defective light bulbs would be calculated as (10/100) * 100 = 10%.

This percentage can then be used to analyze the overall quality of the production line and identify areas for improvement to reduce the number of defective light bulbs. Additionally, the quality control manager may choose to conduct regular inspections and sampling to continuously monitor and improve the production process.