1. An agency is employed to collect data regrading the use of public transport in Adelaide. The agency places an employee at each of the city bus stops between the hours of 8:00 am and 9:00 am each day for one week. Members of the public are asked, "How frequently do you use public transport?"
(a) Describe the population.
(b) Would you expect the results to contain bias? Give reasons for your answer and state the likely effect.
(c) Outline a better sampling technique.