1# shuilideyu
If only the data over years 8 – 15 were considered, a reasonable linear fit could be obtained. This model, however, would profoundly over-predict the steroid level when x = 25 years. Use this result in explaining what is meant by “scope of model”.
如果只考虑8-15年的数据，应该可以获得一个合理的拟合结果。但是当X=25年时，这个模型将极大地高估类固醇的水平。这个结果也说明了模型是有其应用范围的。
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