What helps in pre-testing of the questionnaire?
Sample survey
Pilot survey
Personal interview
Sampling errors
The method which cannot be used by illiterates.
Telephone interview
Sampling
Mailing questionnaire
A group or section of the population from which information is to be obtained is known as:
Sample
Random
Sampling error
______________ is known as method of complete enumeration.
Census
None of these
____________ method does not allow influencing of the respondents by the interviewer.
______________ is a method of gathering information from individuals.
Primary data
Secondary data
Survey
Raw data is also known as:
Sample method
In __________ method the investigator asks questions over the telephone.
A survey which includes every element of the population is known as:
____________ errors can arise in data acquisition,by non-response or by bias in selection.
Non-sampling errors
Random sampling
Non-random sampling
