___________ 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
____________ questions are easy to use and to codify for analysis.
Open ended
Closed ended
Interview
None of these
______________ method is cheaper.
Personal interview
Mailing questionnaire
Telephone interview
Sampling
_____________ is a preliminary piece of research conducted before a complete survey to test the effectiveness of the research methodology.
Sample survey
Pilot survey
Census
______________ are mainly selected on the basis of judgement,purpose,convenience or quota.
Non-random sampling
Non-sampling errors
_____________ is a tool,which helps in understanding problems by providing information.
Data
Information
Survey
____________ helps in pretesting of the questionnaire.
The difference between the actual value of a parameter of the population and its estimate is the ____________.
____________ questions are used to get more than just a one word answers.
A survey which includes every element of the population is known as ______________.
