结果解释中有些不明白的,比如“参考水平”是怎么回事儿?
为什么饱和模型时,卡方值和自由度为0?
还有那个可信区间有什么意义?
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楼主: talata
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[问答] [求助]求助spss高手有关loginear,在线等! |
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高中生 25%
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回帖推荐If the 95% confidence interval on the odds ratio includes the value of 1.0, by convention the variable is not considered a useful predictor variable. When the odds ratio is 1, then a change in value of the independent variable is not associated with a change in the odds that the dependent variable equals a given value. Note in SPSS this is referenced as the confidence interval of Exp(B), where Exp ...
That is, the odds ratio is the natural log base e raised to the power of b. There will be a b coefficient for each category of the categorical variable, except the reference category. The odds of a person in the given category of an independent variable (the category corresponding to b) also being associated with the reference category of the dependent variable (usually 1, corresponding to an even ...
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