老師這個(gè)題的原假設(shè)是什么啊
這個(gè)圖上不是只反映了距離兩段之和相加等于總的距離，為什么距離平方之后還相等呢也就是TSS=RSS+ESS
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%.
用計(jì)算器DATA STAT算出來的r *SX*SY 為什么結(jié)果不對(duì)？
Reusing sets of random number draws across Monte Carlo experiments decreases the estimate variability across experiments by using the same set of random numbers for each simulation.這句話為什么對(duì)？
A control variate involves replacing a variable x (under simulation) that has known properties with a similar variable y that has unknown properties.這句話什么意思？
第34題，當(dāng)說到F分布時(shí)，自由度指n-k-1還是k？為什么這兩個(gè)都稱為自由度？
這題用的是F分布？算式不能理解，請(qǐng)解釋。
可以解釋一下這個(gè)題嗎，解析沒懂
什么時(shí)候/n，又什么時(shí)候/n-1
老師為什么在課程視頻里老師說這兩種非線性的相關(guān)系數(shù)不要求掌握計(jì)算啊
老師好，我想問一下這里為什么說95%的置信區(qū)間只有一個(gè)，就是雙尾了呢？一般這個(gè)單雙尾是如何來進(jìn)行判斷呢？
可以用這個(gè)公式嗎
這個(gè)題從何分析？什么思路呀？過程可以詳細(xì)解釋一下嗎？
老師，為什么題目中說的是0.05而不是0.95，0.05不應(yīng)該是reject嗎為什么題目中說的是accept
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