Suppose we randomly select a student and send them a postal survey,
but the student has moved address and so never receives the survey.
What type of bias will this result in?
What is the main advantage of using a random sample?
What is the main advantage of using a large sample?
A large sample is always better than a random sample: True or false?
Suppose I classify a natural forest region into two zones, which are quite different:
Region A is mostly dunes and lightly vegetated, and is on the coastal side of a ridge;
Region B is more densely vegetated and on the inland side of the ridge.
I then take samples of sugar ants (Camponotus app) from each zone to study their size.
What is the best description of the type of sampling method being used?