It is a graphical presentation of frequency distribution. Variable characters of the different groups are indicated on the horizontal line (x-axis) called abscissa while frequency, i.e. number of observations is marked on the vertical line (y-axis) called ordinate. Frequency of each group will form a column or rectangle. Such a diagram is called ‘histogram’ and is made use of in presenting any quantitative data such as the one given below.

This topic covers: Histogram, Frequency Polygon, Frequency Curve, Line chart or Graph, Scatter or XY Diagram, Bar Diagram, Pie or Sector Diagram, Pictogram or Picture Diagram, Semi Logarithmic Graphs, Applications of Semi Logarithmic plots.

Data graphics

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