domains of their pdfs 这个词是什么意思
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Which one of the following statements concerning chi-square and F-distributions is false?
您的回答, 正确答案是: C
A
They are both asymmetric distributions.
B
As their degrees of freedom increase, the shapes of their pdfs become more bell curve-like.
C
正确The domains of their pdfs are positive and negative numbers.
数据统计(全部)
做对次数: 15
做错次数: 7
正确率: 68.18%
数据统计(个人)
做对次数: 1
做错次数: 0
正确率: 100.00%
解析
C is correct, since it is false. Both chi-square and F-distributions are bounded from below by zero, so the domains of their pdfs are restricted to positive numbers
