Veterinary Epidemiology and Zoonosis

BAR CHART

• Vertical bars display the variables and height of the bars is proportional to the number of occurrences of the variable.
• The bar chart is used to display those variables whose counts comprise of whole numbers (Example: Number of cases of a disease and mortality).
• If the bars touch each other, then it is known as Histogram. In this, the variations in a character can be understood easily.
  • Example: Season wise mortality percentage in poultry based on post-mortem examination (1988 – 1997) from Avian Disease Diagnostic Laboratory, Namakkal, Tamilnadu, India. 

Representation of data as "BAR CHART"