how to draw less than and …

Less than method : 
First prepare a less than type cumulative frequency table.
1) On the x – axis use the upper limits of the class.
2) Mark the less than type cumulative frequency on y – axis. 
3) Plot the points using upper limits and corresponding cumulative frequencies. 
4) Join the points by a free hand curve to get ogive and to get the cumulative frequency polygon join the points by line segments. 

More than method : 
First prepare a more than type cumulative frequency table.
5) On the x – axis use the lower limits of the class.
6) Mark the more than type cumulative frequency on y – axis. 
7) Plot the points using upper limits and corresponding cumulative frequencies. 
8) Join the points by a free hand curve to get ogive and to get the cumulative frequency polygon join the points by line segments.

Less Than Ogive:- The less than cumulative frequencies are in ascending order. The cumulative frequency of each class is plotted against the upper limit of the class interval in this type of ogive and then various points are joined by straight line.

More Than Ogive:- The cumulative frequencies in this type are in the descending order. The cumulative frequency of each class is plotted against the lower limit of the class interval.