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)問怎么做
這題講義里面沒有列明具體求法,視頻里也沒有提及具體內(nèi)容,為什么會(huì)有相關(guān)題目呢?
老師 這道題公示我會(huì),但是計(jì)算器算不出正確答案。我用計(jì)算器計(jì)算的方法 已經(jīng)寫在第二張圖里了,問號(hào)后面是算出來的數(shù)字,為什么這么奇怪呢?可能給我寫一下計(jì)算器的計(jì)算方法麼?
這道題,答案和題目對(duì)不上
程寶問答