The cumulative frequecny table for the given distribution is :
ltbr Taking upper class limits along X-axis and corresponding cumulative frequencies along Y-axis mark the points (10,7), (15,16), (20,28),(25,36) and (30,42). Join the points marked by a free hand curve (as shown in figure)
`(#NTN_MATH_X_C14_S01_033_S02.png" width="80%">
