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[单选题]
Which is the degree of freedom (自由度)of this distribution?
A.10
B.20
C.21
D.26
提问人:网友songyan1986
发布时间:2022-01-07
A.10
B.20
C.21
D.26
A、N is centered (中心) at 0, whereas T is centered at n-1
B、N has a larger standard deviation (标准差)than T
C、N is just another name of T
D、T has a larger standard deviation than N
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