to determine the proportion of students at a university who favor the construction of a parking garage,?

Question

a sample of people driving through the student center parking lot is surveyed and it is found that 45% favor the garage. The actual proportion of the student body who favor the garage is 40%. The difference is most likely an example of sampling: A. bias or B. Variability

Answer 1

The best answer would be bias. If the students were randomly chosen and asked it would be a different story, since it was the students in the student center parking lot, and those students were also drivers, it could be a biased sample by their motives to get the garage.