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.
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I believe the answer is: B. <span> The state governments determine the powers of the central government.
In the confederate system of government, the states held the final decision in determining the type of regulations they want to created.
The role of the central government in this system is only to monitor and assist the activities initiated by the states.</span><span />
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Answer:
It examines possible interaction effects among two independent variables
Explanation:
One-way ANOVA only involves one factor or independent variable.
For the two way ANOVA there are two independent variables.
