Question: To estimate a population parameter (such as the population mean or population proportion) using a confidence interval first requires one to calculate the margin of

To estimate a population parameter (such as the population mean or population proportion) using a confidence interval first requires one to calculate the margin of error, E. Why will there always be errors when using a sample to estimate a population? It is possible to use a sample to estimate a population parameter with 100% accuracy? Explain.

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