398876828 发表于 2023-10-26 21:38:22

正在学习中,有个题搞不明白了,有没有好心人帮忙指点下

A study was conducted on the relationship between the speed of different cars and their gasoline mileage. The correlation coefficient was found to be 0.35. Later, it was discovered that there was a defect in the speedometers and they had all been set 5 miles per hour too fast. The correlation coefficient was computed using the corrected scores. Its new value will be:
a. 0.30 c. 0.40
b. 0.35 d. -0.35

mk762570502 发表于 2023-10-27 08:27:29

相关系数不变,仍是0.35啊,
例如两夫妻,结婚的时候,老婆说她是22岁,婚后一年,老婆说当时是为了结婚,虚报了3岁,但不影响他们仍是夫妻关系啊。

相关关系,不等于回归系数

wzp 发表于 2023-10-27 08:04:23

老兄,你就搞中文吧 看不了:lol{:1_180:}

dgsdgdh 发表于 2023-10-27 08:13:02

A

steven_sun1111 发表于 2023-10-27 08:46:42

:)

njkiller 发表于 2023-10-27 08:57:24

选A

皮皮 发表于 2023-10-27 09:18:40

mk762570502 发表于 2023-10-27 08:27
相关系数不变,仍是0.35啊,
例如两夫妻,结婚的时候,老婆说她是22岁,婚后一年,老婆说当时是为了结婚, ...

牛逼

supercool2022 发表于 2023-10-27 09:24:00

C

涵涵吖 发表于 2023-10-27 09:33:49

mk762570502 发表于 2023-10-27 08:27
相关系数不变,仍是0.35啊,
例如两夫妻,结婚的时候,老婆说她是22岁,婚后一年,老婆说当时是为了结婚, ...

6啊{:1_101:}

canon75 发表于 2023-10-27 11:23:49

谢谢分享
页: [1] 2
查看完整版本: 正在学习中,有个题搞不明白了,有没有好心人帮忙指点下