One common treatment for sinus infections is a steriod spray applied to the nose. Another is antibiotic use. A well-designed clinical trial found that these treatments, alone or in combination, did not reduce the severity of sinus infections. This clinical trial was a randomized experiment that assigned 240 patients among 4 treatments at random: Treatment Antibiotic pill Placebo pill Steroid spray 53 64 Placebo spray 60 63 What does "randomized experiment" mean in this context?A psychologist wants to know if adults with normal vision can be fooled by a certain optical illusion. She recruits 50 students with normal vision from her PSY 120 class and finds that 42of them are fooled by the illusion. What was the psychologist's sample