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The effect of the time of day a science class is taught on test scores is being
studied in an experiment. Giving every student in the experiment the same
final exam is an example of which experimental design principle?

A. Randomization
B. Blocking
C. Direct control
D. Replication

Respuesta :

smillik11

Answer:

the answer is C. Direct Control

Step-by-step explanation:

giving each student the same test is something being controlled directly by the scientist/reasearcher

can't be randomization as it is not random

can't be replication as nothing is being replicated/duplicated

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