Question

1. students of different age groups were asked to put the same jigsaw puzzle together, they were timed to see how long it took.

a. iv: age group
b. dv: the time it took to put the puzzle together
c. cv: jigsaw puzzle

Explanation:

Assuming the question is to identify the correct components (IV, DV, CV) or confirm their correctness:

• Independent Variable (IV) is the factor manipulated, here Age Group (different age groups are tested).
• Dependent Variable (DV) is what’s measured, here time to complete the puzzle (depends on age group).
• Controlled Variable (CV) is kept constant, here the same jigsaw puzzle (so age’s effect is isolated). All labeled components (a: IV=Age Group, b: DV=time, c: CV=jigsaw puzzle) are correct.

Answer:

a. IV: Age Group (correct), b. DV: the time it took to put the puzzle together (correct), c. CV: jigsaw puzzle (correct)