Raw data is also known as ____________.
Primary data
Secondary data
Survey
None of these
____________ errors can arise in data acquisition,by non-response or by bias in selection.
Sampling errors
Non-sampling errors
Random sampling
Non-random sampling
The data in a survey are collected by _____________.
Personal interview
Telephone interview
Sampling
Mailing questionnaire
____________ should be completed before the final survey commences.
Pilot survey
Sample survey
_____________ is a tool,which helps in understanding problems by providing information.
Data
Information
The difference between the actual value of a parameter of the population and its estimate is the ____________.
Non - sampling errors
Non - random sampling
___________ refers to the differences between the sample estimate and the actual value of a characteristic of the population.
______________ are mainly selected on the basis of judgement,purpose,convenience or quota.
____________ are based on first hand information.
There are ___________ main types of sampling.
Two
Three
Four
Five
