31. y2 is equal to
32. Binomial expansion method is applicable when
33. To induce emotional participation of the local community and to create a conductive psychological climate for adoption of a new practice, the method of extension generally applied is
34. Bulletins, leaflets, circular letters, posters, fairs, exhibitions, radio and television are the media of
35. The R rank correlation was suggested by
36. Scope of Sociology is studied by
37. Which of the following is the first step in developing of programme?
38. If each observation of a set is multiplied by 10, then the mean of new set of observation
39. Albert Mayer of USA started a project in September, 1948 known as
40. The second moment about mean is
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