Alicia wants to know what percent of the seventh-grade students at her school plays sports. She
surveyed a random sample of seventh-grade girls at
her school. Which of the following best explains why
this sample is or is not representative of the population
Alicia wants to study?

Two technicians are discussing oil changes. technician a says that waste oil and old filters need to be disposed of according to the law. technician b says that old filters can be returned to the parts department for a core value. which technician is correct?           a. technician a only   b. both technicians a and b   c. technician b only   d. neither technician a nor b