Question

1. true or false: stratified sampling allows for controlling for possible confounders in the sampling stage, while blocking allows for controlling for such variables during random assignment.

true
false

Explanation:

Stratified sampling divides the population into strata (groups) based on confounders at the sampling stage to ensure representation. Blocking in experimental design groups (blocks) similar subjects during random assignment to control confounders. So the statement is correct.

Answer:

True