One important summary value is a t statistic that can be used to measure how well a linear equation fits the data.
一个重要的汇总值是T统计值，它可以用来衡量一个线性方程与数据的吻合程度。
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Because the system equation is changed with time, during the measurement, the statistic character of the system noise and the observation noise cannot be estimated or be determined accurately.
Compared with general statistic regression methods, this equation not only improves the interpretation precision, but also holds more reasonable geological significance.