Collection Of Data

Question 1

Which method of collection of data gives us better results?

Answer 1

Sampling survey

Question 2

Which one of the following error is more serious

Answer 2

Non sampling error

Question 3

The method of collection of data in which reactions can be watched

Answer 3

Personal interview

Question 4

Data collected by the investigator is called the _______________

Answer 4

Primary data

Question 5

The method of interview in obtaining information at a shorter period of time is __________________

Answer 5

Telephonic interview

Question 6

Most expensive method of interview is ________________

Answer 6

Personal interview

Question 7

The method of data collection which cannot be used by illiterates is called_______________________

Answer 7

Mailing questionnaire

Question 8

Census of India is carried out once in ___ years

Answer 8

10

Question 9

personal interview

Answer 9

more expensive

Question 10

mailing questionnaire

Answer 10

Loss of questionnaire

Question 11

Terlephhonic interview

Answer 11

Cheaper or relatively low cost

Question 12

Pilot survey

Answer 12

Pre testing of survey

Question 13

Census

Answer 13

covers every individual

Question 14

mention the two sources of data

Answer 14

a)primary ddata
b) Secondary data

Question 15

Write any two qualities of a good questionnaire

Answer 15

1) The questions should move from general to specific
2) There should be no ambiguity in questions.
3) The questionnaire should not be too long

Question 16

Mention the methods of collecting data

Answer 16

a) Personal interviews
b) Mailing questionnaire

Question 17

Write the differences between census and sample survey

Answer 17

A survey, which includes every element of the population, is known as census. Sample refers to a group or section of population from which information is obtained.

Question 18

What are methods of selecting samples in random sampling?

Answer 18

Lottery method and by using random number tables this can be done.

Question 19

Give the meaning of pilot survey

Answer 19

Once the questionnaire is ready , it is advisable to conduct a try out with a small group of people which is known as pilot survey or pre-testing of questionnaire.

Question 20

Does the lottery method always give you a random sample? Explain.

Answer 20

Yes, the lottery method always gives you a random sample if it is used in the proper manner without any bias. In random sample, each individual unit has an equal chance of getting selected. Similarly, in a lottery method, each individual unit is selected at a random from the population and thereby has equal opportunity of getting selected.
for example, the govt wants to determine the impact of rise in petrol price on the household budget of a particular locality. for this a representative (random) sample of 30 household has to be taken and studied. The names of all 300 household will be listed in the paper and mixed well then 30 names are picked one by one.

Question 21

What is random sampling? Explain briefly=

Answer 21

As the name suggests, random sampling is one where the individual units from population are selected at random,
for example, the govt wants to determine the impact of rise in petrol price on the household budget of a particular locality. for this a representative (random) sample of 30 household has to be taken and studied. The names of all 300 household will be listed in the paper and mixed well then 30 names are picked one by one.
In random sample, each individual unit has an equal chance of getting selected which is similar to the lottery system.

Question 22

Write briefly about NSSO and census

Answer 22

The census of India provides a complete and continuous demographic record of the population. The census being regularly conducted every 10 years since 1881. The first census after independence was conducted in the year 1951. The census officials collect information on various aspects of population such as density, size, sex ratio, literacy migration etc. census data is interpreted and analyzed to understand many economic and social issues in india

NSSO was established by the govt. of india to conduct nationwide surveys on socio-economic issues, The NSSO does continuous surveys in successive rounds. The data collected by NSSO are released through reports and its quarterly journal. NSSO provides periodic estimates of literacy, school environment, utilization of education service, employment, unemployment, child care, utilization of PDS etc.

Question 23

Briefly explain sampling errors.

Answer 23

A population consisting of numerical values has two important characteristics which are of relevance here.
1) central tendency which maybe measured by the mean, median or the mode.
2) Dispersion which can be measured by calculating the “standard deviation”, “mean deviation”, “range” etc.
The purpose of sample is to get one or more estimate of population parameters.
Sampling error refers to the difference between the sample estimate and corresponding population parameter (actual value of the characteristic of the population)
thus the difference b/w the actual value of a parameter of the population and its estimate (from the sample) is the sampling error.