3. What is the difference between the population and sample regression functions? Is this a distinction without difference?
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when is carry deoxygenated blood different part of the body to the heart the the motor rewinding is an expression of the carriage the oxygen to grow from the lungs
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Population regression function(PRF) is the locus of the conditional mean of variable Y (dependent variable) for the fixed variable X (independent variable).
Sample regression function(SRF) shows the estimated relation between explanatory or independent variable X and dependent variable Y.
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