পদ্ধতির তুলনা করুন
নির্বাচিত পদ্ধতিগুলো পাশাপাশি পর্যালোচনা করুন; যে সারিগুলোয় পার্থক্য আছে সেগুলো চিহ্নিত করা হয়।
| দৃঢ় রিগ্রেশন× | Weighted Least Squares (WLS)× | |
|---|---|---|
| ক্ষেত্র | পরিসংখ্যান | পরিসংখ্যান |
| পরিবার | Regression model | Regression model |
| উদ্ভবের বছর≠ | 1964 | 1935 |
| প্রবর্তক≠ | Peter J. Huber (M-estimation, 1964); Frank Hampel (influence function, 1974) | Alexander Craig Aitken |
| ধরন≠ | Regression with outlier resistance | Weighted linear estimator |
| মৌলিক উৎস≠ | Huber, P. J. (1964). Robust estimation of a location parameter. The Annals of Mathematical Statistics, 35(1), 73–101. DOI ↗ | Aitken, A. C. (1935). IV.—On least squares and linear combination of observations. Proceedings of the Royal Society of Edinburgh, 55, 42–48. DOI ↗ |
| অপর নাম | M-estimation regression, robust linear regression, outlier-resistant regression, MM-estimation | WLS, weighted regression, heteroscedasticity-corrected OLS, variance-weighted least squares |
| সম্পর্কিত≠ | 6 | 3 |
| সারসংক্ষেপ≠ | 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. | Weighted Least Squares is a generalization of Ordinary Least Squares (OLS) regression that assigns each observation a weight inversely proportional to its error variance, thereby down-weighting high-variance data points and up-weighting precise ones. Introduced in its general matrix form by Alexander Craig Aitken in 1935, WLS is the canonical remedy when heteroscedasticity is present and the error variance structure is known or can be reliably estimated. |
| ScholarGateডেটাসেট ↗ |
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