In my opinion, the influencing factors for this survey would have been privacy and time. Many of the students could have been too tired to answer properly, since it was early in the morning (the beginning of school). They could have chosen one randomly or without thinking much about it. Another important factor would have been privacy because the students could have felt pressured to answer a certain way. The first students to answer could have chosen the more expensive one to show off. The others might have felt the need to make the same choice to fit in. Without privacy, there is no guarantee for the truth and what would cause certain individuals to lie.