Histograms are graphical representations of data sets. The bar's height represents the frequency and the bar's width is proportional to the classes in which the data has been divided.This example shows the distribution of salaries of the Acme Corporation. By looking at the data in this form, we can see that the majority of employees make the middle-range salary ($44,000-$54,000).
http://www.statcan.gc.ca/edu/power-pouvoir/ch9/histo/5214822-eng.htm
These plots allows the easy visualization of experimental data.These plots gives us a good and direct conclusion of the experimental data.Star plots allow you to compare different types of data for various experiments or designs. A box plot graphically represents a set of data along five points: the median, minimum, maximum and one point half way between each extreme and the median.
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