Sampling Errors refer to the difference between the actual value of a parameter of the population and its estimate. It is possible to reduce the magnitude sampling error by taking a larger sample.2017-07-16 11:35:13
Non-Sampling Errors refer to the more serious than sampling errors because a sampling error can be minimised by taking a larger sample.
Random Sampling is the method where the individual units from the population are selected at random.2017-07-16 11:33:38
Non-Random Sampling is the method, where all the units of the population do not have equal chance of being selected and convenience or judgment of the investigators.
Census Surveys is the survey that induces all units of population to analyse everyone as a whole in the country.2017-07-16 11:32:01
Sample Surveys is a subset of the population is taken. It is confined to only a limited group of people and is based upon their respective opinion.
Mode of Data Collection are (i) Personal Interviews; (ii) Mailing Interviews; (iii) Telephonic Interviews2017-07-16 11:30:47
Sources of Collection of Data2017-07-16 11:29:45
(i) For Primary Data sources are (a) Personal Interviews; (b) Mailing Questionnaires; (c) Telephone Interviews.
(ii) For Secondary Data sources are (а) Newspapers and Magazines; (b) Government Publications, (c) Non-Government Publications, (d) International Organisations.
Data is a collection of facts, such as value or measurements. Data can be Qualitative or Quantitative2017-07-16 11:26:24
Sources of Data are (i) Primary Source, refers to collection of data, direct from its source of origin. (ii) Secondary Source, refers to collection of data by same agency, which already collected the data and processed.