A new headache remedy was given to a group of 25 subjects who had headaches. Four hours after taking the new remedy, 20 of the subjects reported that their headaches had disappeared. From this information you conclude:
A) that the remedy is effective for the treatment of headaches.
B) nothing, because there is no control group for comparison.
C) that the remedy is not effective for the treatment of headaches.
D) nothing, because the sample size is too small.
E) that the new treatment is better than aspirin.
Answer: nothing, because there is no control group for comparison
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