auto-correlation
[/ˌɔːtoʊ kɔːrəˈleɪʃən/]
nounfemininepl: auto-correlações
autocorrelação
1. A statistical measure that quantifies the correlation of a variable with itself at different time intervals or lags
The auto-correlation of the time series decreases as the lag increases.
A autocorrelação da série temporal diminui conforme o intervalo de atraso aumenta.
2. In signal processing, the cross-correlation of a signal with itself to identify periodicities or patterns
Auto-correlation analysis revealed a strong 12-month cycle in the sales data.
A análise de autocorrelação revelou um ciclo forte de 12 meses nos dados de vendas.
3. In regression analysis, the presence of correlation among residual errors, violating the independence assumption
High auto-correlation in the residuals suggests the model may be misspecified.
Alta autocorrelação nos resíduos sugere que o modelo pode estar mal especificado.
Auto-correlation is a highly technical term used primarily in academic, statistical, and scientific contexts in both English and Portuguese-speaking countries. It is essential in econometrics, time series analysis, and quality control. In Brazil, the term 'autocorrelação' is standardized in universities and research institutions, with no significant regional variations. The concept is particularly important in Brazilian economic research and industrial applications.
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