Final answer:
The statement that approximately 75% of many manufacturers' quality problems can be traced back to defects in purchased materials is True.
Step-by-step explanation:
According to the given information, approximately 75% of many manufacturers' quality problems can be attributed to defects in purchased materials. This means that a majority of quality issues in the manufacturing process can be traced back to the materials used.
For example, if a manufacturer purchases faulty components or raw materials, it can lead to defects in the final product, impacting its quality. Therefore, it is important for manufacturers to ensure that they source high-quality materials to minimize defects and improve overall product quality.