Question: what are the advantages of using questionnaires in research?
Answer: (1) Economical: It is an economical way of accumulating information. ... 
(2) Wide Coverage: ... 
(3) Rapidity: ... 
(4) Suitable in Special Type of Response: ... 
(5) Repetitive Information: ... 
(6) An Easier Method: ... 
(7) It Puts Less Pressure on the Respondents: ... 
(8) Uniformity: