Subgroups are to stratified random sampling as ____ is/are to the ...

[newbem]

Subgroups are to stratified random sampling as ____ is/are to the randomized block design.
 
  a. homogeneity
 b. randomization
  c. blocks
 d. order effects

Question 2

A memory test in which participants recall items in any order they choose is called a
 
  a. yes/no recall test.
  b. paired associate recall test.
  c. free recall test.
  d. serial recall test.

[alexisweber49]

Answer to Question 1

c

Answer to Question 2

C

[newbem]

Great answer, keep it coming

[softEldritch]

Gracias!