The transportation department of a large city wants to estimate the proportion of residents who would use a system of aerial gondolas to commute to work. the gondolas would be part of the city’s effort to relieve traffic congestion. the department asked a random sample of residents whether they would use the gondolas. the residents could respond with yes, no, or maybe. which of the following is the best description of the method for data collection used by the department? (a) a census (b) a sample survey (c) an experiment with a completely randomized design (d) an experiment with a randomized block design (e) an experiment with a matched-pairs design