Explanation
We are given the following:
The newspaper staff surveyed a group of students at a band concert about what their favorite elective is.
We are required to determine if the situation is biased or unbiased and give the reason.
We know that in a biased sample, one or more parts of the population are favored over others, whereas in an unbiased sample, each member of the population has an equal chance of being selected.
Therefore, the situation is biased because the choice of students surveyed simply supports band over others.