Measuring and understanding the aging kraft paper

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Reference no: EM131021369

The article Measuring and Understanding the Aging Kraft Paper on Power Transformers contained the following observations on degree of polymerization for paper specimen for which viscosity times concentration fell in a certain middle range:

418, 421, 421, 422, 425, 427, 431, 434, 437, 439, 446, 447, 448, 453, 454, 463, 465

A probability plot confirmed that the data is from normal distribution.

a) Calculate a two-sided 95% confidence interval for true average degree of polymerization. Does the interval suggest that 440 is a plausible value for true average degree of polymerization? What about 450?

b) Determine a 99% predication bound for the next observation.

c) Compare the 99% upper confidence bound for the mean with the 99% upper prediction bound for the observation.

Reference no: EM131021369

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