Box plots (sometimes called box-and-whisker plot) show the distribution of a variable by using quartiles. The boundaries of the box in the middle are the first and third quartiles of the data, with the median of the data in its center. The box is drawn from Q1 to Q3 with a horizontal line drawn inside it to denote the median. Lines extend from each box to capture the range of the remaining. The box plot must be featured on a scale to show these values clearly. Read the minimum value in line with the first line.