PART ? 20. Describe the sampling plan adopted in this case. Do you think it is appropriate? 21. Do you think that the sample size was appropriate in this case? Present statistical reasoning to support your answer. 22. This case made use of telephone surveys. How would you customize the fieldwork process mentioned in the book to the case of telephone interviews? PART ? 20. Describe the sampling plan adopted in this case. Do you think it is appropriate? 21. Do you think that the sample size was appropriate in this case? Present statistical reasoning to support your answer. 22. This case made use of telephone surveys. How would you customize the fieldwork process mentioned in the book to the case of telephone interviews