Of the following survey methods, which is the most costly approach?
A) Mail survey
B) Door to door personal interview
C) Telephonic interview
D) Internet survey

Question

Quizplus · Accepted Answer

Door to door personal interviews are the most costly approach as they involve hiring trained persons to physically visit each respondent's house to conduct the survey. This not only adds up the salary cost but also the travel and transportation expenses.

Of the Following Survey Methods, Which Is the Most Costly