Question

Identify the sampling,method.

You want to determine the number of text messages students at your school send in a month. You go to the cafeteria and ask every 4th student that walks in.

a- random
b- systemic
c- stratified
d-m none of these

My answer is none of the these because it's biased for only students that used the cafeteria.

Answer 1

However, what if you assume that students who bring their lunch or just want to hang out use the cafeteria?

Answer 2

so are you saying it could be stratified?

Answer 3

It would be stratified if only one grade used the cafeteria at that time.