Collection of Data Test - 4

This method selects unit with equal probability and replacement. Because units are selected with replacement, a unit can be selected for the sample more than once.

Because an investigator will not want a data full of pitfall and dificulties.

It is the pool from which statistical data is drawn.

According to the Census Act 1948, population of India is counted using Census alongwith various charecterstics of the population.

Questionnaire is generally sent through mail to informants to be answered as specified in a covering letter, but otherwise without further assistance from the sender. Whereas, a schedule is generally filled by the research worker or enumerator, who can interpret the questions when necessary.

Pilot surveys, typically taken by smaller groups, help determine the efficiency of the future survey while also helping organizations smooth out difficulties before administering the main survey.

Although the Census,1951, was 9th census of India but it is the first census after independence.

If a researcher wanted to create a systematic sample of 1,000 students at a university with an enrolled population of 10,000, he or she would choose every tenth person from a list of all students.

In this method, each unit have an equal probability/chance of getting selected, hence the sampling is unrestricted as well as random

The divided groups are known as clusters

Because the manager is collecting data personally from the informants

This method is popularly known as Census Method used for collecting data from each and every unit of the population.

Since primary data is collected by the investigator according to his/her objectives, the data is more reliable than secondary data.

Union and state governments at time appoint some committees or commissions to make research into any problem such as Finance Commission, Minority Commission, Planning Commission etc. These committees are given a term to probe into the matter. After the expiry of the term, they present the report to the respective authority, which are then published.

It is a type of non random sampling in which selection is based on the opinion of an expert.

Under sampling technique a lot of expenses are saved both in terms of money and energy not only in the collection of data but also in the ministration, transport and training etc. This is because in sample technique only an action of the population is studied and examined to arrive at the desired conclusion, thus, economy is maintained in all the phases of the enquiry conducted under this technique.

Because census method provides a detailed, reliable, and true measure of population without any sampling error.

Under this method, the investigator collects the data indirectly by interviewing the third persons who are supposed to be in close touch with the original informants or the incidence. This method of collecting the data is adopted when the original informants are either not found or found to be reluctant to part with the desired information, or the incidence concerned is not accessible.

Because of unavailabilty of the main informant the information is collected from a third party which is likely to have the required information.

Sugar mill assosiation's publications are part of various industrial and trade associations and are Non Government Publications

This law has emerged from the mathematical theory of probability. The pith and substance of this law is that the behavior of an individual event may be erratic and imponderable but when a large number of events of same category are considered, a stable behavior emerges.

This method is not a method of random sampling because some charecterstics are formed to select the population

After forming stratas, final subjects are selected randomly from thoes stratas.

NSSO has been publishing Sarvekshana since July 1977. It has been the major source of information based on the socio-economic surveys undertaken by NSSO on varioes aspects of national importance.

a. If a researcher wanted to create a systematic sample of 1,000 students at a university with an enrolled population of 10,000, he or she would choose every tenth person from a list of all students.

b. Data is selected based on characteristics of a population and the objective of the study.

c. The researcher first selects groups or clusters and then from each cluster, selects the individual subjects either by simple random sampling  or systematic random sampling.

d. One might divide a sample of adults into subgroups by age, like 18-29, 30-39, 40-49, 50-59, and 60 and above. To stratify this sample, the researcher would then randomly select proportional amounts of people from each age group.