Question

identify which type of sampling is used: random, systematic, convenience, stratified, or cluster.
a magazine asks its readers to call in their opinion regarding the amount of advertising in the present issue.
which type of sampling is used?
a. stratified
b. random
c. convenience
d. systematic
e. cluster

Explanation:

The magazine is asking readers who are easily accessible (those who choose to call in) to give their opinion. This is convenience sampling as it is based on the ease of data - collection. It is not random (no random selection process), not systematic (no fixed - interval selection), not stratified (no division into subgroups), and not cluster (no division into clusters and selection of clusters).

Answer:

C. Convenience