這題不是給了區(qū)間嗎 為什么最后用的是單尾不是雙尾呢?
老師,這一題與第72題計算R方的公式不一樣啊
經(jīng)濟危機跟相關(guān)系數(shù)以及協(xié)方差為什么會有這樣的關(guān)系???相關(guān)系數(shù)衡量的不是變量之間的相關(guān)性么,題目是想論證變量引發(fā)經(jīng)濟危機?
可以寫一個詳細(xì)的解題過程嗎?
A firm is concerned about potential increases in the federal funds rate and their impact on the S&P 500. For a 3-month forecast period, the firm’s economics team estimates the following: A 60% probability that the Federal Reserve will not raise the federal funds rate. A 32% probability that the return on the S&P 500 will be between -10% and +10%. A 38% chance that the return on the S&P 500 will be less than -10%. A 24% joint probability that the return on the S&P 500 will be greater than 10% and that the Federal Reserve will not raise the federal funds rate. Based on the estimates above, given that the Federal Reserve raises the federal funds rate, what is the probability that the return on the S&P 500 is greater than 10%? A 10%. B 15%. C 20%. D 40%.
請問什么情況下必須用單尾?什么情況下必須用雙尾?
多重共線性為什么會導(dǎo)致標(biāo)準(zhǔn)誤增大,具體是影響標(biāo)準(zhǔn)誤中的哪個因子?
老師,像這種非選擇題如何輸入答案呢?
F檢驗和決定系數(shù)R的計算是一個東西嗎?
老師您好,D院選項殘差項不存在序列自相關(guān)這句話是對還是錯?是這句話錯誤才不選還是這話描述的對,但是不符合題意才不選?
老師 能否解釋一下 為啥單尾是1.645而雙尾是1.96呢?
按照PPT中的例子,F(xiàn)=26.666575,跟F分布表有什么關(guān)系?。縁分布表怎么查???
懷特檢驗關(guān)于epsilon^2的回歸方程沒看懂,可以詳細(xì)說明一下嗎,怎么來的
940.31及30.52是怎樣計算出來的?
請問b選項為什么對呀?
程寶問答