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A) Is your estimation always correct? Please briefly explain your reasoning. B) If you start with a bigger sample, (under the condition that the confidence

A) Is your estimation always correct? Please briefly explain your reasoning. B) If you start with a bigger sample, (under the condition that the confidence level and standard deviation remain unchanged,) then does it affect the accuracy of the estimation? Please briefly explain your reasoning. C) What happens to the confidence interval if the standard deviation takes a bigger value? Please briefly explain your reasoning

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