Consider 200 students. A method selects 20 by drawing the first 10 names alphabetically and 10 last names alphabetically.
Is this an SRS?
- A
No, but it is a stratified sample
- B
Yes, because the procedure is rule-based
- Ccheck_circle
No, because not all groups of 20 students are equally likely
- D
Yes, because every name appears once
Explanation
An SRS requires every possible sample of size 20 to have equal probability. The deterministic alphabetical rule does not produce randomness.