Statistical Analysis of Gold Assay and Other Trace-Element Data

Details

• Personal Author:
  Koch GS Jr. ; Link RF ; Schuenemeyer JH
• Description:
  The principal procedures for the statistical analysis of gold assay and other trace-element data depend on applying either the normal frequency distribution or the lognormal frequency distribution. The consequences of applying both methods are examined through reference to example data from United States and South African gold mines. It is concluded that for estimation of average grades, except for certain data with a very high coefficient of variation (ratio of standard deviation to mean), use of the lognormal distribution is ordinarily undesirable because bias may be introduced and little efficiency can be gained. However, if biased average grades can be tolerated, as in the examination of data from surveys in exploration geochemistry, use of the lognormal distribution may be desirable. Various statistical analyses are detailed, and the tables presented to implement the analyses are more complete than those previously published. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRC - Denver Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-127
• NIOSHTIC Number:
  nn:10008731
• NTIS Accession Number:
  PB-198827
• Citation:
  NTIS: PB 198 827 :1-127
• Federal Fiscal Year:
  1971
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 198 827
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b2b9bc68b8854f0d976b7ac41f1abcb923f079fa6743dcd690bfc2fa39f55f1cb72942f06b900132c1c555f8ef2fbb24a1f06e331afececd40ed4e03ff8c10bb
• Download URL:
  https://stacks.cdc.gov/view/cdc/237870/cdc_237870_DS1.pdf
• File Type:
  [PDF - 46.94 MB ]