|:| Question 6 [I out of 2 points Identify the awls] in the experiment or studyIr described. A medical researcher believes that Supplements of glucosamine can help to reduce the pain of arthritis. She would like to test the supplement at two different dosage levels. She designs an experiment as follows to test her conjecture. She will obtain a group of volunteers who suffer from arthritis. Each patient's condition will be evaluated lav a doctor at the start of the experiment. Volunteers will he randomly.-r assigned to one of two groups. Each dav for the duration of the experimentr patients in group 1 will receive a low dose of glucosamine, patients in group 2 will receive a higher dose of glucosamine. After a suitable amount of time {two months, for example}, the doctor will evaluate each patient's progress. Based on the amount of inflammation and the patient's report on the amount of pain. the doctor will give each patient a numerical score to represent their improvement. The amount of improvement for the two groups will then be compared. The doctors and technicians administering the supplements will not know whether patients receive a low dose or high dose. Identityr the most serious aw in this experiment