
二維數據分析競技場(中階)

Quiz
•
Mathematics
•
10th Grade
•
Easy
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14 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
正相關與負相關可以從散布圖中清楚的比較出來。
是
否
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
設X,Y,Z三個變數中,Z = − X,則X與Y呈正相關時,Y與Z必呈負相關。
是
否
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若相關係數r = 0,則散布圖上所有的點必在水平線上或鉛直線上。
是
否
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
設兩變數X與Y有n個樣本點且Y = 2X − 3,則X與Y呈完全直線正相關。
是
否
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
設三變數X,Y,Z,已知X與Y的相關係數為0.3,而X與Z的相關係數為− 0.6,則由此可知X與Y的相關程度較X與Z的相關程度高。
是
否
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
設兩變數x,y的相關係數為0.3,若u = 5x + 1,v = 3y − 2,則u與v的相關係數為0.3。
是
否
7.
MULTIPLE CHOICE QUESTION
30 sec • 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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