Sampling nurses. You want to survey nurses who work at a particular hospital. Of the 90 nurses who work at this hospital, 40 work in the maternity ward, 20 work in the oncology ward, and 30 work in the surgical ward. You decide to study 10% of the nurse population so you choose nine nurses as follows: four nurses are chosen at random from the 40 maternity nurses, two are chosen at random from the 20 oncology nurses, and three are chosen at random from the 30 surgical nurses. Is this a simple random sample? Explain your response.