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In particular, it measures the degree of dispersion of data around the sample's mean. Investors use variance to see how much risk an investment carries and whether it will be profitable.

Levels of supply and demand for varying prices can be plotted on a graph as curves ... effect to determine whether to proceed. What Is an Example of the Law of Supply and Demand?

and the answer is retrieved in the medical knowledge repository through the semantic query logic conversion, and finally an intelligent questioning model based on the medical knowledge graph covering ...