Answer
See explanation
Work Step by Step
a. An advantage of conducting a survey by asking people to call a telephone number and give their response to a question is that it is a relatively cheap and easy way to collect data from a large number of people. It would cut down on labor costs.
A disadvantage of this method is that it may be difficult to reach a representative sample of the population, as people who choose to call and do the survey leads to selection and sample bias.
b. The sampling technique used in a survey that asks people to call a telephone number and give their response to a question is convenience sampling.
