Estatística aplicada à química: dez dúvidas comuns

Química Nova

Livia Maria Zambrozi Garcia Passari¹  Patricia Kaori Soares¹  Roy Edward Bruns¹  Ieda Spacino Scarminio² 

[1] ,Universidade Estadual de Campinas Instituto de Química Campinas SP ,Brasil

关键词: linear regression;    median;    non-parametric statistics;   

DOI  :  10.1590/S0100-40422011000500028

来源: SciELO

【 摘 要 】

Ten common doubts of chemistry students and professionals about their statistical applications are discussed. The use of the N-1 denominator instead of N is described for the standard deviation. The statistical meaning of the denominators of the root mean square error of calibration (RMSEC) and root mean square error of validation (RMSEV) are given for researchers using multivariate calibration methods. The reason why scientists and engineers use the average instead of the median is explained. Several problematic aspects about regression and correlation are treated. The popular use of triplicate experiments in teaching and research laboratories is seen to have its origin in statistical confidence intervals. Nonparametric statistics and bootstrapping methods round out the discussion.

【 授权许可】

CC BY-NC   
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