33.
The . . . . . . . . method consists in the collection of data concerning the living, the working conditions of people in a given area with a view to formulate practical social measures for their betterment and welfare.

35.
Which types of sampling method is ideally suited, where there is no knowledge about population?

36.
In an experimental group dynamic situation and new social norms arise

38.
What is positivism?

39.
A relationship in which change in one variable always induce change in another variable is known as