劉同學(xué)
2018-05-20 16:41An analyst gathered information about three economic variables, He noted that whenever variable A increased by one unit, variable C increased by 0.6 units but variable B decreased by 0.7 units. The correlation between variables A and B and the correlation between variables A and C respectively, are closest to: A Answer A B Answer B C Answer C 這題在問(wèn)啥?
所屬:CFA Level I 視頻位置 相關(guān)試題
來(lái)源: 視頻位置 相關(guān)試題
2個(gè)回答
張瑋杰助教
2018-05-21 15:42
該回答已被題主采納
同學(xué)你好,這題考察的是相關(guān)性,相關(guān)性是數(shù)據(jù)之間的變動(dòng)關(guān)系,題目里說(shuō)了,A上升,C也一定上升,A上升,B也一定下降,這表示一種很完美的線性關(guān)系,注意是一個(gè)變量一定跟著另一個(gè)變量變動(dòng),所以是完全正相關(guān)和完全負(fù)相關(guān)的關(guān)系,而變動(dòng)多少個(gè)單位是它們的斜率。
ry
2018-07-26 23:02
該回答已被題主采納
為什么不是選B
