Plz tell me how to plot a graph of less than or more than type ogive and also how to find median by using that graph...
Please help!!!
Share
Plz tell me how to plot a graph of less than or more than type ogive and also how to find median by using that graph...
Please help!!!
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Here we use the lower limit of the classes to plot the curve.
How to plot a More than type Ogive:
In the graph, put the lower limit on the x-axis
Mark the cumulative frequency on the y-axis.
Plot the points (x,y) using lower limits (x) and their corresponding Cumulative frequency (y)
Join the points by a smooth freehand curve. It looks like an upside down S.
Steps involved in calculating median using more than Ogive approach -
1. Convert the series into a 'more than ' cumulative frequency distribution as shown above .
2. Let N be the total number of students who's data is given.N will also be the cumulative frequency of the last interval.Find the (N/2)th item(student) and mark it on the y-axis.In this case the (N/2)th item (student) is 200/2 = 100th student.
3. Draw a perpendicular from 100 to the right to cut the Ogive curve at point A.
4.From point A where the Ogive curve is cut, draw a perpendicular on the x-axis. The point at which it touches the x-axis will be the median value of the series as shown in the graph.
hope this helps u
follow me for more clarifications
thank u