Question
How is median determined graphically when you are given ‘less than ogive’ or ‘more than ogive’?
Solution
Determination of median graphically : Following steps are involved in this case :
1. Convert the frequency distribution series into ‘less than’ or ‘more than’ cumulative series.
2. Present the data graphically to make a ‘less than’ or ‘more than’ ogive.
3. Determine N/2 th item of series.
4. From this point (on the Y axis of the graph), draw a perpendicular to the right to cut cumulative frequency curve.
5. From the point where perpendicular from Y-axis cuts cumulative frequency draw a perpendicular on OX-axis.
6. That point will be median where this perpendicular cuts X-axis.
