SOLUTION
Step 1 :
In this question, we are told that the administrator of a large middle school is installing some vending machine in the school.
She wants to know what type of machine would be popular.
In getting the population for the administration;s question , she need to use the population of the school.
Step 2 :
An example of the sample the administrator could use to help answer her question is Stratified Sampling.
CONCLUSION:
1. In getting the population for the administration's question , she need to use the population of the school.
2. An example of the sample the administrator could use to help answer her question is Stratified Sampling.