Question

PLEASE HELP!!!!!! Very urgent!!!
State whether the following is true or false. Give reason for your answer.
a) There are many sources of data.
b) Data collected by investigator is called the secondary data.
c) There is a certain bias involved in the non-random selection of samples.
d) Non-sampling errors can be minimized by taking large samples.
e) Telephone survey is the most suitable merhod of collecting data, when the population is literate and spread over a large area.

Answer 1

a) False
Reason: There are only 2 sources of data-primary and secondary data.
b) False
Reason: The data collected by investigator is called the primary data.
c) True
Reason: Non-random selection of items obstructs the equal chance of every item of the Universe of getting  selected. Hence, the certain bias are involved.
d) False
Reason: If the field of investigation or the population size is large then the possibility of non-sampling increases.
e) False
Reason: This method is only suitable for the illiterate population spread of a large area.

OI Prii MARK KARO BEST!! NOHOLE KINTU MAARIM!! :P