Question

pollsters take a survey of people at a ball game to collect and analyze data about favorite leisure activities of star citys residents. would this study be biased? why or why not?
no, it is not biased. the sample of people at the ball park is representative of star citys residents
no, it is not biased. all people at the ball park will respond to the survey.
yes, it is biased. not all people at the ball park will respond to the survey.
yes, it is biased. the sample of people at the ball park is not representative of star citys residents

Explanation:

The sample is from a specific event - a ball game. It likely over - represents those who like ball games and under - represents other segments of the population, thus not being representative of all Star City residents.

Answer:

Yes, it is biased. The sample of people at the ball park is not representative of Star City's residents.