If that probability is low, then you can reject the null hypothesis that the mean is the best predictor and, correspondingly, gain confidence that a simple linear model offers a good fit for the data.
如果概率很低，那就可以不采用平均值是最佳预测值这一无效假设，并且相应地可以确信简单线性模型是与数据良好吻合的。
In a research context, the alternative hypothesis of a linear model needs to be established by theoretical and statistical arguments.
在研究环境中，需要通过理论参数和统计参数来建立线性模型备择假设。
In non-life insurance, the hypothesis of general linear model is hard to be satisfied.
在非寿险精算中，古典线性回归模型的假设很难得到满足。
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