Bar Diagram - * 1 Dimensional or two dimensional? Height or length = size of data Can measure frequency type and non-frequency type Can represent Discrete data and continuous data Better for non-freq data

Component Bar Diagram – Useful in comparing sizes of different component parts. Helps us understand the relationship between these two. Has two or more components Height is proportionate to size of data


Pie Chart – Two Dimensional (2D). Area is proportionally divided among components 100 equal parts of 3.6% each

Geometric Diagram

  1. Bar Diagram • Simple Bar • Multiple Bar • Component Bar

  2. Pie Diagram / Chart

Frequency Diagram

  1. Histogram

  2. Frequency Polygon

  3. Frequency Curve

  4. Ogive (Cumulative Frequency Curve)

  5. Arithmetic Line Graph (Time Series Graph)

Histogram - 2D / 2 Dimensional figure. Area of rectangles is proportional to frequency if class width is same. Represent continuous data. No space between rectangles. Can be used to find Mode

Frequency Polygon – Plane bounded by lines. Midpoints of rectangles in histogram can be joined to make this. Area under the curve = total frequency or sample size. Grouped data

Frequency Curve - Freehand curve that passes through the points of frequency polygon as closely as possible.

Ogive – Two types – Less than, More than. Grouped. Gives Median.

Arithmetic Line Graph – Time on x-axis, variable along y-axis