金程問(wèn)答關(guān)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(cuò)了吧,應(yīng)該是圖片中我藍(lán)色筆寫(xiě)的那樣??
該題的解釋分析呢?
老師b選項(xiàng)做的是89%,我計(jì)算是87%,請(qǐng)講解一下
老師,這里算樣本方差,用到u估計(jì)值的方差等于西格瑪除以根號(hào)n,這個(gè)怎么理解,u代表什么含義
Monte Carlo模擬時(shí),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(qǐng)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(qǐng)問(wèn)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(fēng)險(xiǎn)有關(guān)嗎???
這里解析所說(shuō)的“z統(tǒng)計(jì)量”是什么統(tǒng)計(jì)量????
這道題和上課最后一個(gè)知識(shí)點(diǎn):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(shí)點(diǎn)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(shè)?
老師,怎么理解,估計(jì)均值u的方差等于西格瑪除以n,均值都一樣,西格瑪波動(dòng)率應(yīng)該是0
請(qǐng)問(wèn)怎么做
程寶問(wèn)答