What kind of sampling design is used in each of following cases? A large company surveys 100 employees by taking 2 random samples of the 10 managers and 18 samples of the 90 non-managerial employees....

What kind of sampling design is used in each of following cases?

1. A large company surveys 100 employees by taking 2 random samples of the 10 managers and 18 samples of the 90 non-managerial employees.


2. A concert venue offers tickets in 3 zones: orchestra, grand tier, and balcony. Tickets in the orchestra zone are most expensive, and tickets in the balcony zone are least expensive. Managers of the venue want to survey approximately 150 guests at an upcoming concert about their overall experience. They randomly select 50 tickets from each zone and invite those guests to participate in the survey.


3. The police set up checkpoints at randomly selected road locations, then inspect every driver at those locations.


4. The service manager at a car dealership inspects every fifth car to make sure that cars are detailed after being serviced