Woman using the Urinella, a type of female urination device, to adapt to standard men's room urinals. A female urination device, female urination aid, or stand-to-pee device (STP) is a device which aids a female to urinate while standing upright. Variations include basic disposable funnels to more elaborate reusable designs. Female urination devices have increased in popularity since the 1990s.
Each of the rectangles in the histogram has a base of 25, and the heights are 3, 7, 8, 10, 1, and 1. Thus the total area of the histogram is 3x25+7x25+8x25+10x25+1x25+1x25=750. We want the value with area 750/2=375 to the right of it and 375 to the left of it.
We begin this process by finding the range of our data. In other words, we subtract the lowest data value from the highest data value. When the data set is relatively small, we divide the range by five. The quotient is the width of the classes for our histogram. We will probably need to do some rounding in this process, which means that the total number of classes may not end up being five. When the data set is relatively large, we divide the range by 20.