Journals / Gazi Üniversitesi Fen Bilimleri Dergisi / 2003 / Cilt: 16 - Sayı: 4

En küçük hacimli elips kestiricilerine dayalı Hotelling's $T^2$ istatistiği

Hotelling's $T^2$ statistic based on minimum-volume-ellipsoid estimator

Pages
691–695
Publication Date
2022-10-18
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Hotelling's $T^2$ based on minimum volume ellipsoid estimator has given better result than the classical one.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Hotelling's $T^2$ is a popular statistic.
📊
Key Findings & Data:In practice, $T^2$ is computed using the sample covariance matrix, S, as an estimate of the population covariance matrix, $Sigma$.
💡
Conclusion & Impact:Hotelling's $T^2$ based on minimum volume ellipsoid estimator has given better result than the classical one.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Hotelling's $T^2$ is a popular statistic. In practice, $T^2$ is computed using the sample covariance matrix, S, as an estimate of the population covariance matrix, $Sigma$. This estimator has many properties, but in some cases other covariance matrix estimators can be reasonable. In this paper, we consider alternative covariance $T^2$ matrix and location estimator named Minimum Volume Ellipsoid estimator for statistics in case of outliers. The simulation study was performed to compare the two statistics. Hotelling's $T^2$ based on minimum volume ellipsoid estimator has given better result than the classical one.

Özet

Hotelling's $T^2$ popüler bir istatistiktir. Pratikte $T^2$ örneklem kovaryans matrisinden yararlanaılarak hesaplanır. S, kitle kovaryans matrisi $Sigma$'nın tahmin edicisidir. Bu tahmin edicinin birçok özelliği vardır, fakat bazı durumlarda diğer kovaryans matris tahminleride sözkonusu olabilir. Bu çalışmada aykırı değer varlığında $T^2$ istatistiği için en küçük hacimli elips kestiricisi adı verilen alternatif bir kovaryans matrisi ve konum kestiricisi incelenmiştir. Her iki istatistiği karşılaştırmak için simulasyon çalışması yapılmıştır. Simulasyon çalışması sonucunda en küçük hacimli elips kestiricisine dayalı Hotelling's $T^2$'nin klasik Hotelling's $T^2$ 'den daha iyi sonuç verdiği görülmüştür.

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Cite This Article

AKTAŞ, S., ÇETİN, C. M. (2022). En küçük hacimli elips kestiricilerine dayalı Hotelling's $T^2$ istatistiği. Gazi Üniversitesi Fen Bilimleri Dergisi, Cilt: 16 - Sayı: 4, 691–695. https://ajindex.com/articles/521783

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References (1)

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