關于RSS和SSR之前的講義和現(xiàn)在的講義不一樣,是改定義了嗎??
這里課件錯了吧,應該是圖片中我藍色筆寫的那樣??
該題的解釋分析呢?
老師b選項做的是89%,我計算是87%,請講解一下
老師,這里算樣本方差,用到u估計值的方差等于西格瑪除以根號n,這個怎么理解,u代表什么含義
Monte Carlo模擬時,數(shù)據(jù)的分布不是特定的嗎?
VaR model's confidence and the statistical test of the VaR區(qū)別不太清楚,請教一下
If the probability distribution of an estimator has an expected value equal to the parameter it is supposed to be estimating, it is said to be unbiased. Between two candidate estimators, the one with a smaller variance is said to use the information in the data more efficiently. When the probability that an estimator is within a small interval of the true value approaches 1, it is said to be a consistent estimator. 請問這段話怎么理解
為什么決定系數(shù)越大越好?決定系數(shù)和系統(tǒng)性風險有關嗎???
這里解析所說的“z統(tǒng)計量”是什么統(tǒng)計量????
這道題和上課最后一個知識點:testing the equality of two,不一樣是嗎???老師可以講一下這道題的思路和知識點嗎?謝謝老師~
X(上面有橫杠)和μx有什么區(qū)別????
為什么阿爾法>p,要拒絕原假設?
老師,怎么理解,估計均值u的方差等于西格瑪除以n,均值都一樣,西格瑪波動率應該是0
請問怎么做
程寶問答