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【单选题】
设 (X 1 ,X 2 ,...,X 8 ) 是取自总体X~ N( μ 1 , σ 1 2 ) 的样本, (Y 1 ,Y 2 ,...,Y 10 ) 是取自总体Y~ N( μ 2 , σ 2 2 ) 的样本,X与Y相互独立,则统计量 服从什么分布A.
F(8,10)
B.
F(10,8)
C.
F(7,9)
D.
F(9,7)
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