A new cough medicine was given to a group of 25 subjects who had a cough due to the common cold. Thirty minutes after taking the new medicine, 20 of the subjects reported that their coughs had disappeared. From this information, you conclude
A) That the remedy is effective for the treatment of coughs.
B) Nothing, because there is no control group for comparison.
C) That the treatment is better than the old medicine.
D) Nothing, because the sample size is too small.
E) That the remedy is not effective for the treatment of coughs.
Answer: nothing, because there is no control group for comparison
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