Indicate whether the following terms are associated with surveys (S) or experiments (E). (a) Random sample (b)

Question:

Indicate whether the following terms are associated with surveys (S) or experiments (E).
(a) Random sample
(b) Two groups
(c) Real population
(d) Real difference
(e) Population directory
(f) Digit dialing
(g) Similar groups
(h) Random assignment
(i) Independent variable