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s = 10. Find an upper natural tolerance limit that has probability 0.90 of containing 95% of the distribution of this quality characteristic. 8.30. A
s = 10. Find an upper natural tolerance limit that has probability 0.90 of containing 95% of the distribution of this quality characteristic. 8.30. A random sample of n = 40 pipe sections resulted in SS a mean wall thickness of 0.1264 in. and a standard deviation of 0.0003 in. We assume that wall thickness is normally distributed. a. Between what limits can we say with 95% con- fidence that 95% of the wall thicknesses should fall? b. Construct a 95% confidence interval on the true mean thickness. Explain the difference between this interval and the one constructed in part (a)
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