A health psychologist wants to test the hypothesis that yellow hospital rooms will shorten the recovery time for surgical patients when compared to recovery times of patients in standard white hospital rooms. Half of the patients are randomly assigned to yellow rooms, the other half to white rooms. The number of days until recovery is noted for each patient.|||independent variable: color of the walls
dependent variable: length of recovery time
control group: the half in white rooms.
experimental group: the half in yellow rooms.
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