The difference between the actual value of a parameter of the population and its estimate is the ____________.
Sampling errors
Non-sampling errors
Random sampling
Non-random sampling
___________ method is expensive.
Telephone interview
Personal interview
Mailing questionnaire
None of these
Raw data is also known as ____________.
Primary data
Secondary data
Survey
______________ is a method of gathering information from individuals.
Sampling
______________ are based on first hand information.
There are ________ main types of sampling.
Two
Three
Four
Five
______________ method is less expensive.
All of these
_____________ is a tool,which helps in understanding problems by providing information.
Data
Information
The purpose of the survey is to ______________.
Collect data
Frequency distribution
____________ are mainly selected on the basis of judgement,purpose,convenience or quota.
