The article Evaluating Tunnel Kiln Performance (Amer.Ceramic Soc. Bull., Aug. 1997
Chapter 7, Problem 14(choose chapter or problem)
The article Evaluating Tunnel Kiln Performance (Amer.Ceramic Soc. Bull., Aug. 1997: 5963) gave the following summary information for fracture strengths (MPa) ofceramic bars fired in a particular kiln:.a. Calculate a (two-sided) confidence interval for true averagefracture strength using a confidence level of 95%.Does it appear that true average fracture strength hasbeen precisely estimated?b. Suppose the investigators had believed a priori that thepopulation standard deviation was about 4 MPa. Basedon this supposition, how large a sample would have beenrequired to estimate m to within .5 MPa with 95% confidence?
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