Question

josé is a student at lake middle school. for a math project, he needs to find out how many pets a typical student at lake middle school has.
a sample that is representative of a population has similar characteristics to the population. that is, there is nothing especially different or unique about the members of a representative sample.
josé wants to collect data from a representative sample. which method is most likely to give him a representative sample of the students at lake middle school?
survey all students whose locker number ends with 5.
survey all students in the dog lovers club.
survey all students who shop at a neighborhood pet store.
survey all students who have no pets.

Explanation:

• Surveying all students in the Dog Lovers club would likely have a bias towards students who like dogs (and may have more pets related to dogs), so it's not representative.
• Surveying all students who shop at a neighborhood pet store may have a bias towards students who have pets (since they are shopping for pet - related items), so it's not representative.
• Surveying all students who have no pets is a non - representative sample as it only focuses on one subset (those without pets) and ignores those with pets.
• Surveying all students whose locker number ends with 5 is a more random way of selecting a sample. There is no inherent bias related to pet - ownership based on locker numbers ending with 5.

Answer:

Survey all students whose locker number ends with 5.