A teacher has 30 students and wants to randomly assign 15 to each of two methods. She writes each student's name on a slip of paper, mixes them in a hat, and draws 15 names for Method A; the rest go to Method B.
Which experimental principle is she implementing?
- Acheck_circle
Random assignment
- B
Replication
- C
Blocking
- D
Stratification
Explanation
She is randomly assigning subjects to treatments without grouping by any variable - random assignment in a completely randomized design.