Q1.In addition to the usual parameters that describe a normal distribution, to completely describe 10 random variables, a multivariate normal distribution requires knowing the: A) 45 correlations. B) overall correlation. C) 10 correlations.
Q2. In a multivariate normal distribution, a correlation tells the: A) relationship between the means and variances of the variables. B) strength of the linear relationship between two of the variables. C) overall relationship between all the variables.
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发表于 2009-1-9 10:28
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