which type of conclusion can be drawn from a randomized controlled double-blind

Question

which type of conclusion can be drawn from a randomized controlled double-blind experiment? Determining if there is a lurking variable involved with the study, and then using that lurking variable as the explanatory variable Determining if the explanatory variable is actually causing changes in the response variable Determining if the response variables are correlated Determining if there is an association between the studied variables, but it's unknown if the explanatory variable is actually changes

Explanation / Answer

The answer is D. Double blinding experiemtn ensures that the preconceived notions about the effects of variables are not taken into consideration

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