To assess the accuracy of a laboratory scale, a standard weightthat is known to weigh 1 gram is repeatedly weighed 4 times. Theresulting measurements (in grams) are: 1.03, 0.85, 0.92, 1.2.Assume that the weightings by the scale when the true weight is 1gram are normally distributed with mean μ. Use these data tocompute a 95% confidence interval for μ.

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