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Guessing a real-valued random variable

Guessing a real-valued random variable

陈傲天
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Guessing a real-valued random variable; why expectation values are mean-square optimal point forecasts. The regression function; why its estimation must involve assumptions beyond the data. The bias-variance decomposition and the bias-variance trade-off. First example of improving prediction by introducing variance. Ordinary least squares linear regression as smoothing. Other linear smoothers: k-nearest-neighbors and kernel regression. How much should we smooth?
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