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Statistical estimation and regression analysis

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What is the purpose of statistical estimation? What statistics do you find most useful in regression analysis? Why?

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This solution discusses the statistical estimation and regression analysis.

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Statistical estimation is a deals with estimating the values of parameters based on measured/empirical data. Wikipedia says "The entire purpose of estimation theory is to arrive at an estimator, and preferably an implementable one that could actually be used. The estimator takes the measured data as input and produces an estimate of ...

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