Identify the design-case 9

Identify the design-case 9

A psychiatrist wanted to test the effects of a new drugs on echolalia (echolalia is the behavior of repeating what you hear, as in echo) of schizophrenic patients. He randomly selected 30 schizophrenic patients and randomly assigned them to two groups 15 patients per group. Group 1 received a no-drug substance (placebo), Group 2 received the Drug. Ten hours later he tested the patients and counted the patients who showed echolalia. Identify the statistical design. Give your answer in the comments space below.

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