______________ is known as method of complete enumeration.
Sample survey
Pilot survey
Census
None of these
__________ helps in pretesting of the questionnaire.
Personal interview
____________ should be completed before the final survey commences.
Telephone interview
____________ refers to a group or section of the population from which information is to be obtained.
Sample
Random
__________ method, the investigator asks questions over the telephone.
Sampling
Mailing questionnaire
___________ refers to the differences between the sample estimate and the actual value of a characteristic of the population.
Random sampling
Non-random sampling
Sampling errors
Non-sampling errors
______________ are based on first hand information.
Primary data
Secondary data
____________ is a smaller group selected from the population from which the relevant information would be sought.
Survey
______________ is a method of gathering information from individuals.
____________ questions are easy to use and to codify for analysis.
Open ended
Closed ended
Interview
