A pharmaceutical company wishes to study a possible new headache medicine.They are doing human trials with 1,000 volunteers who experience frequent headaches.The researchers will need to ________.

Question

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It is important to control for the type of headache the volunteers are experiencing as different types of headaches may respond differently to the medication. This will allow for more accurate results and conclusions to be drawn from the study. Giving all volunteers the same amount of medication (A) may not account for differences in severity of symptoms or individual responses. Separating participants by gender (B) is not relevant to the study and may bias the results. Having only 10 volunteers in the control group (D) is not statistically significant and may not provide accurate comparison data.

A Pharmaceutical Company Wishes to Study a Possible New Headache