Discussion
Regression analysis uses to study .....
Answer: D
Regression analysis studies the causal relationship between two or more variables (printed in the paper as 'casual').
Regression estimates how a dependent variable changes in response to one or more independent variables and expresses that relationship as an equation used for prediction. It treats one variable as depending on the others, which is the cause-and-effect reading the key takes.
The degree of association between variables is measured by correlation, which is the trap. Data variability is measured by dispersion, and finding the best alternative is an optimisation problem.
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