Question

#25 which sampling method will give you the least reliable (i.e. unbiased) sample? (a) cluster sampling (b) stratified sampling (c) systematic sampling (d) convenience sampling (e) simple random sampling

Explanation:

Convenience sampling selects samples based on ease of access. It is highly likely to introduce bias as it may not represent the entire population well compared to other methods like cluster, stratified, systematic, or simple - random sampling which are designed to be more representative.

Answer:

D. Convenience sampling