A study was done on the weights of different types of fish in a pond. A random sample of fish were caught and marked in order to ensure that none were weighed more than once. The sample contained largemouth bass, of which % weighed more than pounds. Which of the following conclusions is best supported by the sample data?
Explanation
Choice D is correct. The sample of largemouth bass was selected at random from all the largemouth bass in the pond, and since % of the fish in the sample weighed more than pounds, it can be concluded that approximately % of all largemouth bass in the pond weigh more than pounds.
Choices A, B, and C are incorrect. Since the sample contained largemouth bass, of which % weighed more than pounds, this result can be generalized only to largemouth bass in the pond, not to all fish in the pond.