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Nonprobability Sample

Your task is to interview a representative sample of attendees for the large concert venue where you work. The new season includes 200 live concerts featuring all types of musicians and musical groups. Since neither the number of attendees nor their descriptive characteristics are known in advance, you decide on a nonprobability sampling. Based on past seating configurations, you can calculate the number of tickets that will be available for each of the 200 concerts. Thus, collectively, you will know the number of possible attendees for each type of music. From attendance research conducted at concerts held during the previous two years, you can obtain gender data on attendees by type of music.

How would you conduct a reasonable reliable nonprobability sample?

Which sampling method (simple Random, Systematic, Stratified, etc.) would you suggest and why?