Question

Weight control is a serious issue for packaging of food stuffs. If more than 25% of a production run are under filled then the production run must be redone. A single production run makes 600 packages. A quality control inspector at a large food packaging plant selects the first 50 packages produced that day to weigh and finds 12 of them are under filled.

What assumption did the inspector violate that will stop them from doing a hypothesis test?

They did not meet the n < 10% of the population size condition.

They did not meet the S/F condition.

They met all assumptions.

They did not meet the randomness condition.

Answer 1

Here sample size is 50 that means 50% of the population.

The sample size is less than 25% in population size. It is the assumption of trails are independent. But here is not like that situation.

Therefore the answer is they did not meet the s/f condition.