Brushing teeth, wasting water? A recent study reported that fewer than half of young adults turn off the water while brushing their teeth. Is the same true for teenagers? To find out, a group of statistics students asked an SRS of 60 students at their school if they usually brush with the water off. In the sample, 27 students said

“Yes.” The dotplot shows the results of taking 200 SRSs of 60 students from a population in which the true proportion who brush with the water off is 0.50.