Final answer:
The hypothesis about the occurrence of people becoming ill after eating oysters in a restaurant is that everyone who ate oysters got sick, regardless of whether the oysters were raw or cooked.
Step-by-step explanation:
The hypothesis about the occurrence of people becoming ill after eating oysters in a restaurant is that everyone who ate oysters got sick. This means that all the individuals who consumed oysters experienced symptoms like nausea and dizziness regardless of whether the oysters were raw or cooked.