The president of a school club would like to purchase T-shirts for members of the club and asks members which size they would like to order. The results are shown in the histogram below. A histogram titled T-shirt sizes has size on the x-axis and frequency on the y-axis. Small, 15; medium, 22; large, 26; extra large, 5. Which of the following is a true statement regarding the information shown in the histogram? T-shirt size is a discrete quantitative variable. T-shirt size is a continuous quantitative variable. Frequency of each size is a discrete quantitative variable. T-shirt size is a categorical variable.