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29#
发表于 2012-3-26 13:34
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One of the limitations of correlation analysis of two random variables is the presence of outliers, which can lead to which of the following erroneous assumptions? A)
| The presence of a nonlinear relationship between the two variables, when in fact, there is a linear relationship. |
| B)
| The absence of a relationship between the two variables, when in fact, there is a linear relationship. |
| C)
| The presence of a nonlinear relationship between the two variables, when in fact, there is no relationship whatsoever between the two variables. |
|
Outliers represent a few extreme values for sample observations in a correlation analysis. They can either provide statistical evidence that a significant relationship exists, when there is none, or provide evidence that no relationship exists when one does. |
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