Frequency Curve/polygon
How to register and join MyElimu CLICK HERE

Post Reply 
 
Thread Rating:
  • 1 Votes - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Frequency Curve/polygon
MyElimu Offline
System
*******

Posts: 225
Likes Given: 7
Likes Received: 101 in 64 posts
Joined: Feb 2014
Reputation: 1
Friend:  Add as Friend

Points: 1,673.63 points
Country: Tanzania
Post: #1
Post Icon Frequency Curve/polygon

0
0
FREQUENCY POLYGON
A frequency polygon is obtained by plotting the frequency of the class against its class marks, and joining the parts with line segments.
[Image: image001.gif]


Frequency polygon can also be drawn with the help of histogram by joining their mid points of rectangle.
[Image: frequency-polygon.gif]


Frequency Curve
When the consecutive points on the graph join with a specific pattern smoothly shown in the below example. Frequency curve can also be drawn with the help of histogram by joining their mid points of rectangle. Frequency polygon and frequency curves are same except frequency curve is drawn using free hand and frequency polygon is drawn using scale. (Each point is joint using scale)
[Image: frequency_curve.gif]

CUMULATIVE FREQUENCY CURVE

The cumulative frequency curve/polygon is obtained by plotting the cumulative frequency against the upper class boundary.
In cumulative frequency curve we draw using using free hand and in cumulative frequency polygon we draw each point using scale.

EXAMPLE
[Image: cumulativefreqcurve1.PNG]

To draw this graph we have to make cumulative frequency table. We add up all the frequency step by step.
For example#000000 solid;margin:15px;width:95%;">
FC.F
22
46
1016
521
425

After calculating CF which is cumulative frequency we plot the points and join it.

 

 
03-26-2014 06:45 PM
Visit this user's website Find all posts by this user Like Post Quote this message in a reply
Post Reply 




User(s) browsing this thread: 4 Guest(s)