Twenty-five engineering students independently measured the melting point of lead. The mean and standard deviation of the

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Twenty-five engineering students independently measured the melting point of lead. The mean and standard deviation of the 25 measurements were 329.6 and 5.1°C, respectively. Using a level of significance of 10%, what is the error that can be expected if the sample mean is used as an estimate of the true melting point of lead?

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