The solution is wrong since the resulting statement is wrong.
Answer:
The 20 subjects constitutes the sample
Step-by-step explanation:
Given


Required
What does 20 represent?
The 150 patients being treated is the population of the study. When a certain amount is selected from a population, the selected is referred to as a sample.
So, this means that, 20 represents sample of the study.
Two hundred thirty eight thousandths. I had to seriously confirm that with multiple people (who also had only a rough idea) because you don't even use that very often if at all past elementary (unless your teacher is super strict). XD