The common sense notion talks of proving that X causes Y; the scientific notion holds that we can only infer causality without proving it.
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Q8: Randomizing treatments to test units is not
Q9: Test unit mortality refers to instances where
Q10: Extraneous variables need to be controlled to
Q11: If physical control,randomization,and research design features do
Q12: In true experimental designs,extraneous variables must never
Q14: The R in X-O-R syntax stands for
Q15: In experiments,the greater the time between observations
Q16: External validity is concerned with whether the
Q17: A time-series experiment undertakes periodic measurement on
Q18: The measures taken on the test units
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