Question

diego took a survey to find out how many students plan to go to a school band concert. there are more than 1,000 students in his school. he selected a sample by asking the first 50 students he met at band practice. which of these statements are true about his sampling method? select all that apply. his sample will probably be biased. his sample will definitely be valid. his sample will probably be random. his sample will probably be invalid. his sample will be a good representation of the student population.

Explanation:

1. Diego sampled only students at band practice, who are far more likely to be interested in a band concert than the general student body. This makes the sample biased.
2. A biased sample that does not represent the whole student population is not valid, so the sample will probably be invalid.
3. The sample is not random (it targets a specific group), not definitely valid, and not a good representation of all students.

Answer:

• His sample will probably be biased.
• His sample will probably be invalid.