1) A metallurgist wants to determine the degree of homogeneity in a sample of a metal alloy. The concentration of manganese, a trace component of the alloy, is measured as sevrnl loations in the sample. The results are given below, in units of ppm by mass (parts per million by mas). 245. ppm 223. ppm 266. ppm 253. ppm 255. ppm 241. ppm 270. ppm 236. ppm 259. ppm Find the average concentration of manganese in the alloy (in ppm), and the 95% confidence limits for the average value.

1) A metallurgist wants to determine the degree of homogeneity in a sample of a metal alloy. The concentration of manganese, a trace component of the alloy, is measured as sevrnl loations in the sample. The results are given below, in units of ppm by mass (parts per million by mas). 245. ppm 223. ppm 266. ppm 253. ppm 255. ppm 241. ppm 270. ppm 236. ppm 259. ppm Find the average concentration of manganese in the alloy (in ppm), and the 95% confidence limits for the average value.

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter22: Inorganic Materials

Section: Chapter Questions

Problem 43AP

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