Identify the sampling technique used in the following situations.
1. Every 12th customer entering a shopping mall is asked to select his or her favorite store.
2. In a university, all teachers from three buildings are interviewed to determine whether they believe the students have higher grades now than in previous years.
3. Supervisors are selected using random numbers in order to determine annual salaries.
4. A teacher writes the name of each student in a card, shuffles the cards, and then draws five names.
5. A head nurse selects 10 patients from each floor of a hospital.
1. Every 12th customer entering a shopping mall is asked to select his or her favorite store.
2. In a university, all teachers from three buildings are interviewed to determine whether they believe the students have higher grades now than in previous years.
3. Supervisors are selected using random numbers in order to determine annual salaries.
4. A teacher writes the name of each student in a card, shuffles the cards, and then draws five names.
5. A head nurse selects 10 patients from each floor of a hospital.
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1. Every 12th customer entering a shopping mall is asked to select his or her favorite store.
2. In a university, all teachers from three buildings are interviewed to determine whether they believe the students have higher grades now than in previous years.
3. Supervisors are selected using random numbers in order to determine annual salaries.
4. A teacher writes the name of each student in a card, shuffles the cards, and then draws five names.
5. A head nurse selects 10 patients from each floor of a hospital.
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