A new headache remedy was given to a group of 25 subjects who had headaches for 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) nothingbecause the sample size is too small
(c) nothing, because there is no control group for comparison
(d) that the new treatment is better than aspirin
(e) that the remedy is not effective for the treatment of headaches
Answer: C