What is the difference between Histogram and bar graph?
A histogram and a bar graph looks similar but they have more differences than similarities :
1.A bar graph can be drawn for both discrete and random date but histogram can only be drawn for continuos data.
2.The width of the rectangle in a bar graph is of no significance but in a histogram width of the rectangles represent class-width and is equally important as height of the bar.
3.Area under each rectangle represents proportional frequency in a histogram whereas there is no such explanation in bar graph.
4.There are no gaps left between the rectangles in a histogram,whereas a bar graph has gaps left between the bars.
5. Representing a data as histogram gives us the value of "mode"