State whether the following statements are True or False.
(i) There are many sources of data. (True/False)
(ii) Telephone survey is the most suitable method of collecting data, when the population is literate and spread over a large area. (True/False)
(iii) Data collected by investigator is called the secondary data. (True/False)
(iv) There is a certain bias involved in the non-random selection of samples. (True/False)
(v) Non-sampling errors can be minimised by taking large samples. (True/False)
State whether the following statements are True or False.
(i) There are many sources of data. (True/False)
(ii) Telephone survey is the most suitable method of collecting data, when the population is literate and spread over a large area. (True/False)
(iii) Data collected by investigator is called the secondary data. (True/False)
(iv) There is a certain bias involved in the non-random selection of samples. (True/False)
(v) Non-sampling errors can be minimised by taking large samples. (True/False)
(i) False
There are mainly two sources of data: Primary and Secondary.
(ii) False
Mailing questionnaires would be more suitable as the population is literate. The telephonic survey is most suitable in case of Illiterate population spread over a large area.
(iii) False
Investigator may collect the data by conducting an enquiry or an investigation. Such data are called primary data, as they are based on first hand information.
(iv) True
In a non-random sampling method all the units of the population do not have an equal chance of being selected and convenience or judgement of the investigator may create a bias.
(v) False
It is difficult to minimise non-sampling error even by taking a large sample as they include errors in data acquisition, non-response errors and sampling bias.
(i) False
There are mainly two sources of data: Primary and Secondary.
(ii) False
Mailing questionnaires would be more suitable as the population is literate. The telephonic survey is most suitable in case of Illiterate population spread over a large area.
(iii) False
Investigator may collect the data by conducting an enquiry or an investigation. Such data are called primary data, as they are based on first hand information.
(iv) True
In a non-random sampling method all the units of the population do not have an equal chance of being selected and convenience or judgement of the investigator may create a bias.
(v) False
It is difficult to minimise non-sampling error even by taking a large sample as they include errors in data acquisition, non-response errors and sampling bias.
