<span>Wyatt Earp and Doc Holliday were the two officers made famous by the OK Corral shootout. When the Cowboys threatened their lives several times, the deputy officer Doc Holliday supported Wyatt Earp. The two officers participated in a 30 second shootout. All of the assailants who came against them got killed.</span>
Answer:
c. Observational studies have both independent and dependent variables.
d. Observational studies can be used to test hypothesis.
Explanation:
Observational studies are ones in which a researcher makes observations about his thoughts and views. He observes the risk and other effects before actual test takes place. This is usually the initial phase of research where observations are made for suitability of certain things that are to be researched. There is initial feasibility test conducted to identify whether the further research process is beneficial or not.
Answer:
A production possibilities frontier graph.
this is the answer Ouachita River
only bad bxxtches would know <3
Slaves made up the lowest social class.
