15.2 $$ \mathrm{LRS}=2 \cdot\left(\hat{m}{+} \log {2} \frac{\left(\frac{\hat{m}{+}}{\hat{m}{+}+\hat{m}{-}}\right)}{\left(\frac{m{+}}{m{+}+m{-}}\right)}+\hat{m}{-} \log {2} \frac{\left(\frac{\hat{m}{-}}{\hat{m}{+}+\hat{m}{-}}\right)}{\left(\frac{m{-}}{m{+}+m{-}}\right)}\right) $$ [解析]:似然率统计量(Likelihood Ratio Statistics)的定义式。 15.