Enumerate the different methods of collecting data. Which one is the most suitable for conducting Reference reaserch methodology cr kothari enquiry regarding family welfare programme in India? Explain its merits and demerits ?

“It is never safe to take published statistics at their face value without knowing their meaning and limitations.” Elucidate this statement by enumerating and explainingthe various points which you would consider before using any published data. Illustrate your answer by examples wherever possible?

Critically examine the following:
(i) Interviews introduce more bias than does the use of questionnaire.
(ii) Data collection through projective techniques is considered relatively more reliable.
(iii) In collection of statistical data commonsense is the chief requisite and experience the chief teacher.