At the beginning of a call to the cable company, a message tells customers, “After you finish talking to our customer service re
presentative, you will be asked to take a five-question survey about the level of service you received. It would be appreciated if you could please stay on the line to answer the survey questions.” What type of sampling is the cable company using? systematic random sampling voluntary sampling cluster sampling convenience sampling
Voluntary sampling involves someone opting to be a part of the sample. In this situation, customers are given the option to stay on the line to answer a survey; this means it is on a voluntary basis. Thus it is a voluntary sample.
