For the study described below, identify the sample: A bank manager wants to know the average amount of time customers of his bank have to wait in line. As such, 300 customers were polled and asked their average wait time at the bank. Of these, 27 were extremely dissatisfied with the amount of time they had to wait in line in recent months. The 27 people who were dissatisfied The customers who were waiting in line All of the bank customers The 300 customers polled