I am a little confused about the difference between census and convenience sampling. Supposedly, I will conduct a survey involving all grade 3 student in one school (total is about 120). If I send out the online survey to All the students, does it make it a census?
If, say, only 20% of student responded. Basically, that means, 20% of students volunteer to participate. Should they be counted as convenience sampling?
I would appreciate it if anyone can clarify this for me.