False. Extending form the top and the botton of tthe box are vertical lines called "whiskers" To find the whisker find the simple value that is no more than 1.5 IQR abpve the third quartile, and the smallest sample value that is no more than 1.5 IQR below the frist quartile,so the length of the whisker is not equal to 1.5 IQR, but it is equal to the length between the quartile lines to these points