Factorial experiment in estimating the accuracy of average Ni and Co contents in laterites
Abstract
1.In estimating confidence limits for the mean metal concentration in ore, data on the moments of distribution and the number of samples are taken into account. It is also important to have an idea of the degree of independence of differences between determinations, since the usual statement that the variance of the mean is n times less than the variance of a single determination is valid only for determinations with independent variations (n is the number of single determinations).
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References
- Miller R., Kahn J. Statistical Analysis in the Geological Sciences. World, 1965.
- Hicks Ch. Basic Principles of Planning Experiments. World, 1967.
- Delury D. B. Values and integrals of the Orthogonal polmomials up to n=26. University of Toronto Press, 1950.
- Krumbein W. C., Graybill F. A. An Introduction to Statistical models in Geology. McGraw Hill, N. Y., 1965.
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