5. The following list presents the alternative samples obtained by a healthcare marketing research firm for its clients. Describe the type of sample each one represents.

a. Ten people sitting in the waiting room are asked to describe the ambience of the facility and the attitude of the receptionist.

b. The medical school samples alumni regarding evaluations of their education.

Respondents are selected in an amount equal to the same population of specialties from the graduating class.

c. The walk-in clinic calls every 15th patient who visited the clinic on Wednesday to assess whether the patient was greeted by the receptionist and given a handbook regarding the scope of services and an explanation as to how the clinic operates.