Answer:
The North side
Explanation:
Why, because they had more advanced tech.
Answer:
Avoid observer and subject bias
Explanation:
Double-blind study is a human clinical trial method where neither the examiner nor the examiner knows what is being used as a variable at any given time. The purpose of the double-blind test is to avoid any conscious or unintentional interference with the results of an experiment and thus to avoid observer or subject bias in the result of the experiment.
Answer:
Cluster sampling
Explanation:
Cluster sampling is the sampling that has been used in the statistics. It is a natural sampling. This sampling has been done on the population that is naturally presented in the population. The population has been divided into clusters and groups then it has been done the random sample from the groups. This sampling method has been used especially in marketing. This sampling method has been used when a researcher does not get information about the whole population.
It has two types:
- Single-stage cluster sampling
- Two-stage cluster sampling