A recent Gallup poll showed that 47% of Americans said they worry a great deal about the quality of the environment and the impacts of climate change. Assume that 47% holds for the population of U.S. adults and suppose that a survey of a random sample of 50 U.S. adults is conducted in which they are asked whether or not they are concerned about climate change. Let X represent the number of these 50 who report they are concerned about climate change. Then X is a binomial random variable.