Question
Distinguish between a bar diagram and a histogram.

Answer

Bar diagram is different from a histogram in two ways:
  1. In a bar diagram, we are concerned with the length of the bar. They are one-dimensional form of presentation. But, a histogram is a two-dimensional form of presentation where length and width both are taken into account.
  2. In a bar diagram, there is a gap between different bars whereas in a histogram, there is no gap in between the different rectangles.
The following figures illustrate the idea:

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