One day, while eating a prepackaged meal, my son bit down on something hard. It was a metal clip of some sort. We sent the object to the manufacturer, who determined that it was a clamp from one of their processing machines. In a letter of apology, the director of quality assurance indicated that all packages are screened by an X-ray machine prior to shipping to prevent incidents such as what happened to us. Comment on the manufacturer’s quality assurance sampling:

a. In what way does the sampling not meet the criteria of any sampling method discussed in this module?

b. Why is inference unnecessary?