A hospital marketing director has several research projects to undertake this quar- ter. He must try to determine the appropri- ate sampling methodology in light of each problem. Provide your recommendation on each issue:

(a) The hospital urology department wants to establish a sexual dysfunc- tion clinic. The department head wants to get an estimate of the num- ber of men aged 35 to 60 in the com- munity suffering with some form of sexual dysfunction.

(b) A primary care medical group is trying to determine whether patients are being greeted and serviced appropri- ately by the billing and admitting departments.

(c) An MCO is trying to determine what concerns physicians have in agreeing to become part of its panel of physi- cians who will treat its subscribers.