Answer:
The sampling method used is Systematic sampling
Step-by-step explanation:
The different kind of sampling used in research includes:
1. Simple random sampling
2. Systematic sampling
3. Stratified sampling
4. Cluster sampling etc.
Systematic sampling
In this type of sampling method, a sample is usually obtained by randomly taking or selecting one unit from the first k units in the sampling frame and every kth unit henceforth. An example: You have 100 samples, and you randomly choose 10 of them in random spots.
The features of systematic sampling
1. Every unit in the sampling frame has the same probability of being selected
2. Different sets of sampling units do not have the same probability of being included in the sample.