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The Consequences Of Incorrect Analysis Of Blocked Experiments [conseqüências Da Análise Incorreta De Experimentos Blocados]
Registro en:
Quimica Nova. , v. 30, n. 2, p. 436 - 440, 2007.
1004042
10.1590/S0100-40422007000200035
2-s2.0-33947578427
Autor
Bortoloti J.A.
Bruns R.E.
Institución
Resumen
Errors are always present in experimental measurements so, it is important to identify them and understand how they affect the results of experiments. Statistics suggest that the execution of experiments should follow random order, but unfortunately the complete randomization of experiments is not always viable for practical reasons. One possible simplification is blocked experiments within which the levels of certain factors are maintained fixed while the levels of others are randomized. However this has a cost. Although the experimental part is simplified, the statistical analysis becomes more complex. 30 2 436 440 Barros Neto, B. Scarminio, I. S. Bruns, R. E. Como fazer experimentos: pesquisa e desenvolvimento na ciência e na indústria, Ed. da Unicamp: Campinas, 2001Box, G.E.P., Hunter, W.G., Hunter, J.S., (1978) Statistics for experimenters. An introduction to design, data analysis and model building, , Wiley: New York Anderson, R.L., Bancroft, T.A., (1952) Statistical Theory in Research, , McGraw-Hill: New York Wooding, W.M., (1973) J. Qual. Tech, 5, p. 16 Cornell, J.A., (1988) J. Qual. Tech, 20, p. 2 Cornell, J.A., (1971) J. Am. Stat. Assoc, 66, p. 42 Hicks, C.R., (1973) Fundamental Concepts in the Design of Experiments, , 2nd ed, Holt, Rinehart and Winston: New York Bortoloti, J.A., Andrade, J.C., Bruns, R.E., (2004) J. Braz. Chem. Soc, 15, p. 241 Bortoloti, J.A., Bruns, R.E., Andrade, J.C., Vieira, R.K., (2004) Chem. Intel. Lab. System, 70, p. 113 Kowalski, S.M., Potcner, K.J., (2003) Qual. Progress, 36, p. 60