The manager of a shopping mall distributed a customer-satisfaction survey by handing it to people as they came through one of the doors to the mall one day. Of those handed out, 215 were completed and returned. Should the results of the survey be generalized to the population of all customers of the shopping mall?

Answer:The correct option is D.  No, because a random sample from all customers of the shopping mall was not selectedStep-by-step explanation:In statistics, Bias can be described as a term which depicts error if a sample is not taken evenly or it depicts errors taken from an unjust sampling.In statistics, sampling bias means the errors which occur if one part of the population is favoured more then the rest of the populations. In this kind of bias, the individuals for experimentation are not chosen randomly.As the customer satisfaction survey was distributed in only one of the gates hence, it does not give a generalized result and the result is biased.