The only issue here is that those who has internet access can do this survey--this can not represent the population.
Including retired?
所有跟帖:
• correct. You are right on this point too -比花花还花- ♂ (87 bytes) () 09/07/2012 postreply 09:19:17
The only issue here is that those who has internet access can do this survey--this can not represent the population.
• correct. You are right on this point too -比花花还花- ♂ (87 bytes) () 09/07/2012 postreply 09:19:17