Steps in Developing a Sampling Plan (5) Advantages of Disadvantages of probability samples probability samples The researcher can be sure of They are more expensive than obtaining information from a nonprobability samples of the representative cross section of the sample size in most cases. The population of interest rules for selection increase interviewing costs and professional Sampling error can be computed time must be spent in developing the sample design The survey results are projectable to the total population Probability samples take more time to design and execute than non probability samplesSteps in Developing a Sampling Plan （5） Advantages of probability samples Disadvantages of probability samples - The researcher can be sure of obtaining information from a representative cross section of the population of interest. - Sampling error can be computed. - The survey results are projectable to the total population. - They are more expensive than nonprobability samples of the sample size in most cases. The rules for selection increase interviewing costs and professional time must be spent in developing the sample design. - Probability samples take more time to design and execute than non￾probability samples