A Medical Researcher Designs an Experiment to Test Whether Supplements

A medical researcher designs an experiment to test whether supplements of glucosamine can help to reduce the pain of arthritis.She will obtain a group of 90 volunteers who suffer from arthritis.Each patient's condition will be evaluated by a doctor at the start of the experiment.Volunteers will be randomly assigned to one of three groups.Each day patients in group 1 will receive a low dose of glucosamine,patients in group 2 will receive a higher dose of glucosamine,and patients in group 3 will receive a placebo.After a suitable amount of time,the doctor will evaluate each patient's progress.Based on the amount of inflammation and pain,the doctor will give each patient a numerical score to represent their improvement.The researcher will then compare the improvement for the three groups.Describe a strategy to randomly assign the 90 volunteers to the three treatments.