Public Health Dentistry

There are two main method of presenting data: a) Tabulation A most common way of presenting data in the tables is known as frequency distribution table. Frequency is the no. of units belonging to group of the variable. The variable characteristics such as age has a range from lowest to highest, the age for example ranges between 4---------12. This range is divided into subgroups called classes ( 4 6 , 7 9 , 10 12 ). The class limits are the lowest and highest values that can be included in the class. The difference between the upper and lower limit of a class is known as class interval.