The sampling technique used in the scenario described is simple random sampling, which guarantees each ticket has an equal chance of selection.
The sampling technique used when a $50 gift certificate is given away at the Annual Bankers Convention, where tickets are placed in a bin, mixed, and a blindfolded person selects the winning ticket, is known as simple random sampling. This technique ensures that every ticket has an equal chance of being selected, similar to drawing names out of a hat or using a lottery system. Simple random sampling is considered one of the most basic and fair methods of selecting a sample from a larger population because it minimizes bias and makes it possible to make generalizations about the entire population from the sample.