Tr Jain Vk Ohri for Class 11 Commerce Economics Chapter 2 - Collection Of Data

Answer:

If we want to know the quality of teaching in a school then our informants will be the students studying in that school.

The difficulties that can be encountered in conducting direct personal investigation are:

i)  This method is expensive in terms of the time spent, money and efforts involved.
ii) There exist chances of personal bias on part of students, hence results might not be accurate.
iii) Since the field of investigation is large; thus it will be difficult to approach each and every student of the school. 

Answer:

If we want to collect the data on the health care facilities in our locality, we can go with the indirect oral investigation option. Under this method, the information is not directly collected from the concerned person. It is rather collected from other people or agencies who are likely to have the required information. As it will not be feasible to conduct research on personal basis with 200 families, it will be better to use the data already published by various government, semi- government and reliable private agencies. This will include less cost in terms of time and money involved and we can also seek expert opinion on the same.

Answer:

We can use the indirect investigation method in order to collect the information regarding the literacy rates in our town. Under this we can use the data published by the local government agencies and other reliable non-government agencies.The reason behind choosing this method is that this method will prove less time consuming as well as it is a cheap method of collecting information. Also by using this method we can seek opinion of the experts thereby making this information more reliable.

Answer:

Answer:

i) Secondary data is the data collected by other persons. That is, secondary data is collected by an individual or a group of individuals or any agency in the past for their own purpose but later on used by some other party for some other or same purpose. If the data is collected on a special request then it will be treated as primary data rather than secondary data.

ii) Sources of secondary data are government publications, semi-government publications and private publications. Data collected from such sources are not original as they have not been collected directly by the investigator rather they had been collected by someone else in the past. The secondary sources of data can be in published or unpublished form.

iii) Primary data are always collected directly from the individuals who constitute the universe of study. Primary data means collecting data directly from the actual source of information.


iv) Pilot survey is conducted to assess the quality of questionnaire. Pilot survey are conducted before the final statistical investigation is done. It is a form of pre-testing of the questionnaire on a small sample of the universe that helps in judging the quality of the questionnaire and accordingly, getting to know if any modifications are required in it before the final survey takes place.