South Park International Airways wants to check on customer satisfaction with ticket prices and fees. As a large airline, it has over 1800 flights a day from fifteen different airports. Their in-house researchers, Kyle and Stan, randomly choose thirty flights (two departing flights from each airport) and survey all the passengers on those flights concerning their satisfaction, giving them a snack and beverage voucher which can be redeemed immediately upon turning in the survey. The researchers are ecstatic to note a ninety-seven percent survey completion rate. What type of sample is this?

South Park International Airways wants to check on customer satisfaction with ticket prices and fees. As a large airline, it has over 1800 flights a day from fifteen different airports. Their in-house researchers, Kyle and Stan, randomly choose thirty flights (two departing flights from each airport) and survey all the passengers on those flights concerning their satisfaction, giving them a snack and beverage voucher which can be redeemed immediately upon turning in the survey. The researchers are ecstatic to note a ninety-seven percent survey completion rate. What type of sample is this?

South Park International Airways wants to check on customer satisfaction with ticket prices and fees. As a large airline, it has over 1800 flights a day from fifteen different airports. Their in-house researchers, Kyle and Stan, randomly choose thirty flights (two departing flights from each airport) and survey all the passengers on those flights concerning their satisfaction, giving them a snack and beverage voucher which can be redeemed immediately upon turning in the survey. The researchers are ecstatic to note a ninety-seven percent survey completion rate. What type of sample is this?



a. simple random
b. stratified random
c. cluster random
d. multistage random


Answer: d. multistage random


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