Final answer:
Craig used a stereotype, which is a cognitive shortcut to make quick judgments, leading him to expect all New Zealanders to be like Carl, whom he found friendly and funny.
Step-by-step explanation:
Craig might have used a cognitive shortcut called a stereotype to make the judgment about people in New Zealand being quite friendly and funny, based on his experience with Carl. Stereotypes are simplified and generalized beliefs about a group of people that we use to make quick decisions without having all the necessary information. In Craig's case, because Carl is from New Zealand and displays these traits, Craig has transferred those traits to his expectations of all New Zealanders, which can sometimes lead to inaccuracies because people are diverse and cannot be fully represented by a single example.