Determine the appropriate sampling plan for each of the following scenarios:

(a) An American Red Cross blood center plans on sampling their inventory of stored blood for a quality control study on each of the four types of blood.

(b) A pharmacist plans on selecting a sample of their Lipitor inventory from a large container of Lipitor pills and needs to sample ???? = 100 Lipitor pills.

(c) A researcher must select, without bias, a sample of ???? = 500 individuals from a large pool of volunteers so that there is nearly equal information on four different ethnicities.

(d) The Department of Health in a particular state is studying the height and weight distributions of 10-year-old children. The sampling frame for this study consists of a list of elementary schools and home school associations in the state.

(e) A researcher must select, without bias, a sample of ???? = 50 individuals from a large pool of volunteers so that there is nearly equal information on men and women.