Chapter B (Stages of Survey Work)

Question 1

when data come from asking
every unit in the population

Answer 1

Census

Question 2

when data come from asking a subset of people from a well-
defined population

Answer 2

Sample Survey

Question 3

A process of selecting a sample

Answer 3

Sampling

Question 4

Role of Sampling

Answer 4

1. to estimate/approximate specific unknown parameters from a well-defined population
2. to test a claim about an unknown
   parameter from a well-defined population

Question 5

Reasons for Sampling

Answer 5

1. Do not need to conduct a census to obtain
   information
2. Cost
3. Timeliness
4. Accuracy
5. Detailed Information
6. Destructive Testing

Question 6

▧ Attributable directly to the fact that not all the population units are observed
▧ The extent depends on sample size and
variability of the population

Answer 6

Sampling Error

Question 7

Two Types of Error in Survey:

Answer 7

Sampling Error and Non-sampling Error

Question 8

▧ Attributable to all error sources unrelated to the sampling of respondents
▧ Includes coverage bias, selection bias, non-response bias, interviewer error, response error, coding error, etc.

Answer 8

Non-sampling Error

Question 9

How to control error in survey work?

Answer 9

1. Determine the appropriate sample size
2. Define the target population, attempt to
   maximize population coverage, select a
   sample that fairly represents the entire
   population, and obtain data from as much
   of the selected sample as possible
3. Do a good job of training and supervising
   interviewers, use good questionnaire
   design, and exercise good control over
   coding and data entry

Question 10

is a chain of operations that extends
from data collection to publication of results
▧ Varying degrees of control can be exerted on the quality of each link in the chain

Answer 10

Survey