The statement is false because the median of a frequency distribution CAN be determined from ogives. According to the textbook, an interesting feature of the two ogives together is that their intersection point gives the median. When both the 'less than' ogive and 'more than' ogive are plotted on the same graph, the point where these two cumulative frequency curves intersect corresponds to the median of the frequency distribution. This is a graphical method for locating the median.