4.Which of the following statements about linear regression analysis is most accurate? A) The coefficient of determination is defined as the strength of the linear relationship between two variables. B) A perfectly negative correlation can be depicted by a correlation coefficient of +1. C) When there is a strong relationship between two variables we can conclude that a change in one will cause a change in the other. D) An assumption of linear regression is that the residuals are independently distributed.
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发表于 2008-4-1 13:21
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