পদ্ধতির তুলনা করুন
নির্বাচিত পদ্ধতিগুলো পাশাপাশি পর্যালোচনা করুন; যে সারিগুলোয় পার্থক্য আছে সেগুলো চিহ্নিত করা হয়।
| সাধারণ ন্যূনতম বর্গ (OLS)× | দৃঢ় রিগ্রেশন× | |
|---|---|---|
| ক্ষেত্র | পরিসংখ্যান | পরিসংখ্যান |
| পরিবার | Regression model | Regression model |
| উদ্ভবের বছর≠ | 1805 | 1964 |
| প্রবর্তক≠ | Adrien-Marie Legendre (1805); Carl Friedrich Gauss (1809) | Peter J. Huber (M-estimation, 1964); Frank Hampel (influence function, 1974) |
| ধরন≠ | Linear parameter estimation | Regression with outlier resistance |
| মৌলিক উৎস≠ | Legendre, A.-M. (1805). Nouvelles méthodes pour la détermination des orbites des comètes. Firmin Didot, Paris. [Appendix: Sur la Méthode des moindres quarrés, pp. 72–80.] link ↗ | Huber, P. J. (1964). Robust estimation of a location parameter. The Annals of Mathematical Statistics, 35(1), 73–101. DOI ↗ |
| অপর নাম≠ | OLS, OLS regression, linear least squares, classical linear regression | M-estimation regression, robust linear regression, outlier-resistant regression, MM-estimation |
| সম্পর্কিত≠ | 8 | 6 |
| সারসংক্ষেপ≠ | Ordinary Least Squares (OLS) is the canonical method for estimating the parameters of a linear regression model by minimizing the sum of squared differences between observed and predicted values. First published by Adrien-Marie Legendre in 1805 and independently developed by Carl Friedrich Gauss (who claimed priority from 1795), OLS is provably optimal under the Gauss-Markov theorem: given its assumptions, it yields the Best Linear Unbiased Estimator (BLUE) of the regression coefficients. | Robust regression estimates the linear relationship between a continuous outcome and predictors while sharply reducing the influence of outliers and leverage points. Unlike OLS, which is highly sensitive to extreme observations, robust methods assign down-weighted influence to atypical data points, producing coefficient estimates that remain stable even when a fraction of the data is contaminated or non-normally distributed. |
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