Question

do hamsters prefer red treats or blue treats? two different supplements, which have no effect on taste, are used on identical treats to produce a red treat or a blue treat. volunteer hamsters are randomly assigned to either a red treat or a blue treat, and the researchers rate the treats based on how quickly the hamsters eat them. is blinding demonstrated in the experiment?
no, because the hamsters do not know the color treat they are getting
yes, by having the experimenter in a separate room pick one of the two containers at random and having a treat pulled from that container remotely
no, because the hamsters know whether they are eating a red treat or a blue treat
yes, by having the statistician analyzing the results not know which hamster sampled which treat
yes, by having the hamsters eat the treats out of the container, so they dont know the color of the treat they are eating

Explanation:

Blinding in an experiment means that certain parties (either the subjects, the researchers, or both) are unaware of which treatment is being administered. In this case, having the statistician analyzing the results not know which hamster sampled which treat represents blinding. This helps to eliminate bias in the analysis of the results as the statistician's judgment isn't influenced by knowledge of the treatment - assignment. Hamsters are not aware in the cognitive - sense as humans are, so their lack of knowledge about the color of the treat is not considered blinding in the traditional sense of experimental design. The other options do not properly represent blinding.

Answer:

Yes, by having the statistician analyzing the results not know which hamster sampled which treat