In an Intervention Study of Aging Populations,a Midwest Department of Health

In an intervention study of aging populations,a Midwest department of health attempted to measure the impact of providing in-home care to elderly patients.One group of patients,who had previously been treated in a hospital,was returned to their homes and visited by nurses and volunteers several times per week,while another group stayed in a traditional hospital setting.In 2-4 sentences,explain which group in this scenario constitutes the treatment group and which constitutes the control group.