practice 6: double - blind trial participants to compare the flavors of the two soft drinks in a blind…

practice 6: double - blind trial participants to compare the flavors of the two soft drinks in a blind trial. unfortunately, the ceo discovers that the test coordinator is allowing the competitors soft drink samples to go flat before the trial. this skews the results against the competitor and therefore invalidates the trial. what can the ceo do to ensure that the trial is not only blind, but also double - blind? to ensure that trial is double - blind, the ceo must see to it that the test coordinator is... replaced by a third - party coordinator. unaware which brand is which. blind - folded throughout the trial. immediately fired and replaced.

practice 6: double - blind trial participants to compare the flavors of the two soft drinks in a blind trial. unfortunately, the ceo discovers that the test coordinator is allowing the competitors soft drink samples to go flat before the trial. this skews the results against the competitor and therefore invalidates the trial. what can the ceo do to ensure that the trial is not only blind, but also double - blind? to ensure that trial is double - blind, the ceo must see to it that the test coordinator is... replaced by a third - party coordinator. unaware which brand is which. blind - folded throughout the trial. immediately fired and replaced.

Answer

Brief Explanations:

In a double - blind trial, neither the participants nor the researchers (in this case the test coordinator) should know which treatment (soft - drink brand) is which. This helps to eliminate bias. Replacing the coordinator with a third - party who is unaware of which brand is which ensures the trial is double - blind. Blind - folding the coordinator is not a practical or proper way to make it double - blind, and firing the coordinator doesn't necessarily ensure double - blindness.

Answer:

B. unaware which brand is which.