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Biology, 19.10.2021 01:40 carlo123

QUESTION 21 A study was done to test the effectiveness of echinacea in upper respiratory infections. One group of infections was given echinacea, the other group was treated with placebos. a. We do not have enough information to make any determinations in this case b. Echinacea is only effective in the treatment of a virus, it cannot help with an infection. c. Level of infection is the explanatory variable in this case. d. Level of infection was the response variable in this case. e. None of these answers.

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QUESTION 21 A study was done to test the effectiveness of echinacea in upper respiratory infections....

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