To determine the proportion of students at a university who favors the construction of a parking garage, 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 favors the garage is 40%. This difference is most likely an example of sampling:
A) bias.
B) variability.

Question

Quizplus · Accepted Answer

The difference between the sample proportion (45%) and the actual proportion (40%) suggests that there may be a bias in the sampling process. This means that the sample may not be representative of the entire student body, which is why the sample proportion differs from the actual proportion. Variability refers to the natural differences that occur between samples, but in this case, the difference between the sample and actual proportion is larger than what would be expected due to variability alone. Therefore, A (bias) is the most likely explanation.

To Determine the Proportion of Students at a University Who