Determine the confidence interval for sigma

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Reference no: EM13254629

four determinations of the pH of a certain solution are 7.90, 7.94, 7.91, and 7.93. Assuming normallity of determinations with mean mhu, standard deviation sigma, find:

A. 99% confidence interval for mhu "u"

B. 95% confidence interval for sigma

Reference no: EM13254629

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