题目
The following probability matrix gives the joint probabilities (the inner square represents joint probabilities) of variable X which can assume one of three values {1, 2, 3} and variable Y which can assume one of three values {1, 3, 5}:「huixue_img/importSubject/1564169386477096960.png」Are the two variables independent?
选项
A.No, because 20.0% × 35.0% does not equal 6.0%
B.No, because the upper diagonal is not a mirror of the lower diagonal
C.Yes, because the sum of joint probabilities is 100% which is equal to the sum of each variable's unconditional probabilities
D.It cannot be determined with this information
答案
A
解析
「huixue_img/importSubject/1564169386523234304.png」