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!!!
cutegirl89:
u mean less than cumulative frequency
Yes less than and more than. Both
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More Than Type Cumulative Frequency Curve
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
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thank u
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
Thank you so much for this great answer
:)
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