A school administrator believes that 80 percent of the students at his large school arrive by bus, 10 percent drive themselves, and 10 percent are dropped off by an adult. To investigate this belief, the administrator stands at the school entrance and asks the first 80 students who come through the door how they came to school. He would like to know if the data provide convincing evidence that the distribution of transportation method differs from what he believes it to be. Are the conditions for inference met?