
Measuring is the process of assigning numbers to individuals, objects, or events through the application of some systematic procedure.

There are three kinds of measurement operations: 1. Measurement requiing classification of all observations into categories.

Three Kinds Of
Measurement 
Measurement by classification
into categories:

An Example of Measurement by
Classification:


Measurement by Ranking:

Examples of Measurement by
Ranking:

Measurement by ranking tells
nothing about the actual amounts of a variable. From rank alone the researcher does not know that the tallest child in a class is 63 inches tall. Nor does ranking provide information about the differences in height between the tallest and the shortest child in the class. 

Measurement by Amount:

Examples of Measurement by
Amount:

Measurements can be continuous or discrete:
