Identify the design-case 4

The experimental problem

A psychiatrist wanted to test the effects of three new drugs on serotonin levels of schizophrenic patients.

The experimental design
He randomly selected 30 schizophrenic patients and randomly assigned them to three groups 10 patients per group.
Group 1 received Drug 1,
Group 2 received Drug 2,
Group 3 received Drug 3.

Ten hours later he measured the content of serotonin in the patients blood in nano liters.

Identify the statistical design. Give your answer in the comments space below.