Suechen · 2020年03月20日
问题如下：
Which of the following statements most accurately describe a lognormal distribution?
选项：
A.The mean of lognormal distribution equals the mode of lognormal distribution.
B.The Lognormal distribution's outcome can not be less than zero.
C.Lognormal distribution's probability of a positive value is less than 30%.
解释：
B is correct.
The probability of a lognormally distributed variable is always greater than or equal to 0.
请问C为什么是错的，因为lognormal拟合价格，所以只能是价格数字吗
NO.PZ2015120604000101 问题如下 Whiof the following statements most accurately scria lognormstribution? A.The meof lognormstribution equals the mo of lognormstribution. B.The Lognormstribution's outcome cnot less thzero. C.lognormstributions have outcomes thcannot positive B is correct.The probability of a lognormally stributevariable is always greater thor equto 0. C哪里不对呢？outcome cnot less thzero可以转述为是positive的吗？还是说positive只能用于形容分布是左偏还是右偏？
老师你好，A哪里不对呢，谢谢
