An explanation or prediction for the relationship between two or more variables in quantitative research is called a

theory

Explanation:

a theory offers explanation on a natural phenomena through principles and application of other scientific methods such as applying observation and research methods. A theory organizes ideas with the aim of forming a body of principles which not only explain but is used to predict a phenomena based on the theory's principles

the money supply is the total amount of money available in the economy. how do changes in the money supply affect people and businesses?

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