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Presentation of Data — Economics STD 11 Commerce — Question

CBSE BoardEnglish MediumSTD 11 CommerceEconomicsPresentation of Data4 Marks
Question
What is procedure of drawing histogram.
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Answer

The following steps are to be followed to construct a histogram:
  1. Step 1: Mark class intervals on X-axis and frequencies on Y-axis.
  2. Step 2: The scales for both the axes need not be the same.
  3. Step 3: Class intervals must he exclusive. If the intervals are in inclusive form, convert them to the exclusive form.
  4. Step 4: Draw rectangles with class intervals as bases and the corresponding si frequencies as heights.
  5. Step 5: The class limits are marked on the horizontal axis and the frequency is marked on the vertical axis. Thus, a rectangle is constructed on each class interval.
  6. Step 6: If the intervals are equal, then the height of each rectangle is proportional to the corresponding class frequency.
  7. Step 7: If the intervals are unequal, then the area of each rectangle is proportional to the corresponding class frequency.

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