金程問(wèn)答請(qǐng)教老師,這里的K的數(shù)量需要包含這個(gè)極端值么
老師這道題怎么判斷 是要查卡方分布表么?
這道題答案中 researicher‘s statement 不太理解 more than one population 是超過(guò)一個(gè)樣本總體么?
庫(kù)克距離這里分子越大越發(fā)現(xiàn)是異常值,但這的yi -j不是已經(jīng)把異常值j去掉的嗎,那既然已經(jīng)去掉過(guò)了;怎么說(shuō)明分子越大越有異常值呢
老師,藍(lán)色部分的答案是不是錯(cuò)了,V(x)不是方差嗎,我看答案里把V(x)和V(x)都平方了,最后開完根號(hào)等于的還是V(p)
根本就沒(méi)有修正,題目只有ab兩個(gè)選項(xiàng),正確答案是d
01.單選題 已收藏 已標(biāo)記 糾錯(cuò) An analyst obtains sample statistics on return information for Vay Industries and Ranch Meatpacking as follows: Based on this information, which of the following amounts are the covariance between the two sets of returns and the correlation coefficient, respectively? 這道題的答案解析看不懂,能否再解釋一下。
老師,我想問(wèn)一下iqr怎么算?如果他給出的是7個(gè)數(shù)據(jù)的話,應(yīng)該怎么算呢?沒(méi)太看懂
26題完整的計(jì)算器按法麻煩再教一下
294B:這里為何都要服從normal? C:這里為何服從normal? D:如何錯(cuò)了?
怎么看出來(lái)是卡方分布
怎么看出來(lái)是卡方分布
a one-tailed test is more appropriate if the sample mean is greater or less than the null hypothesized value or the metric is financial such as in this case of a mutual fund's mean return.這句話哪里錯(cuò)了?;;
這里第二小問(wèn)的問(wèn)法是不是不太對(duì)?根據(jù)答案的解析應(yīng)該是問(wèn)的:如果基金經(jīng)理三年戰(zhàn)勝了市場(chǎng),那么他是average經(jīng)理的可能性?
老師,可不可以寫一下怎么按計(jì)算器來(lái)求兩組數(shù)據(jù)之間的correlation?
程寶問(wèn)答