
二維數據分析
Quiz
•
Mathematics
•
10th Grade
•
Easy
胡立信lixinhu 胡立信lixinhu
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19 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
下列有五組二維數據的散布圖,哪一個呈現零相關?
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
如圖,散布圖中若去掉D點後,其相關係數會如何變化,下列敘述何者正確?
變得更接近0
變得更接近1
變成0
變得比1大
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
已知兩變量x與y之數據如下表所示且其相關係數為,求r=?
0.5
1
-0.5
-0.25
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
設某班有30位同學,最近兩次的數學測驗,每位同學第二次成績都比第一次多5分,則兩次成績的相關係數為____
5
1
-1
20
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
94
87
76
65
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
如下圖所示有5筆(x, y)資料:
去掉哪一筆資料後,剩下4筆資料的相關係數最大?
A
B
C
D
E
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
將二維數據(X,Y)中的X,Y各加一個常數後,相關係數不變。
是
否
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