Question

n an attempt to determine the favorite restaurant of people in the city, Sonya surveys every tenth person exiting an Italian restaurant. Which statement is most likely true? The survey should be unbiased because the people were exiting an Italian restaurant. The survey should be unbiased because every tenth person was systematically chosen. The survey could be biased because only every tenth person was surveyed. The survey could be biased because people exiting an Italian restaurant might favor Italian food.

Answer 1

It would be the fourth option - The survey could be biased because people exiting an Italian restaurant might favor Italian food.

The survey is clearly biased because Sonya is selecting a sample that isn't representative of the entire population. Surveying every tenth person exiting the restaurant isn't a problem since it's a type of systematic sampling.