Which of the following is NOT true about non-probability sampling? 

Key Points 

Non-probability sampling represents a set of sampling techniques where the samples are assembled in a manner that does not afford all individuals in the population an equal chance of selection. Here are evaluations of the proposed statements: 

• Non-probability sampling is a fast method: This statement is generally accurate. Non-probability sampling can frequently be executed more swiftly than probability sampling because it doesn't necessitate the establishment of a comprehensive sampling frame that enumerates every individual in the population.
• Non-probability sampling is expensive: This statement is typically incorrect. Methods involving non-probability sampling are usually less financially demanding than those employing probability sampling. This is because they can be carried out more promptly and do not necessitate interaction with every individual in the population.
• Non-probability sampling employs a subjective approach in sample selection: This statement is correct. Given that non-probability sampling does not provide every individual in the population an equal opportunity of being chosen, it is frequently perceived as a more subjective technique. The investigator utilizes their discretion to select participants, which could lead to bias.
• Non-probability sampling is an easy method: This statement is generally accurate. Techniques involving non-probability sampling are often less complex to carry out than those involving probability sampling because they do not necessitate a comprehensive list of the population or intricate random selection procedures.

In conclusion, the assertion that does NOT hold for non-probability sampling is the second statement: "Non-probability sampling is expensive." Contrarily, non-probability sampling techniques are generally less costly than probability sampling methods.