Monday, May 24, 2010

Histograms

Definition of Histogram: A two dimensional frequency density diagram is called a histogram. A histogram is a diagram which represents the class interval and frequency in the form of a rectangle. A histogram is used instead of a bar chart when the bars have unequal width.
The most common form of the histogram is obtained by splitting the range of the data into equal-sized bins (called classes). Then for each bin, the number of points from the data set that fall into each bin are counted. That is Vertical axis : Frequency (i.e., counts for each bin) ,Horizontal axis: Response variable
This is the following sample problem of histogram:

This helps to give the graph a more realistic visual impression.






Hope you like the above example of Histogram. Please leave your comments, if you have any doubts.

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