A certain deck of cards has cards that show one of five different shapes with equal​ representation, so that the probability of selecting any particular shape is 0.20. A card is selected​ randomly, and a person is asked to guess which card has been chosen. The attached graphs show a computer simulation of experiments in which a​ "person" was asked to guess which card had been selected in a large number of trials. Each dot in the dotplots represents the proportion of successes for one person. One dotplot represents an experiment in which each person had 10​ trials; another shows 20​ trials; and a third shows 40 trials. Explain how you can​ tell, from the shapes of the​ graphs, which has the largest sample ​(n