_____________ is a preliminary piece of research conducted before a complete survey to test the effectiveness of the research methodology.
Sample survey
Pilot survey
Census
None of these
The most common type of instrument used in survey is _____________.
Random sampling
Questionnaire
The data are collected and processed by some other agency are called _____________.
Primary data
Secondary data
Randam sampling
There are _________ basic ways of collecting data.
Two
Three
Four
Five
____________ errors can arise in data acquisition,by non-response or by bias in selection.
Sampling errors
Non-sampling errors
Non-random sampling
In a ______________, every individual is given an equal chance of being selected for providing information.
A survey which includes every element of the population is known as ______________.
______________ is a method of gathering information from individuals.
Sampling
Survey
______________ are based on first hand information.
______________ is known as method of complete enumeration.