A decision tree can help you make tough choices between different paths and outcomes, but only if you evaluate the model correctly. Decision trees are graphic models of possible decisions and all ...

Fresh tree stumps the size of dining tables line the road at the Elkhorn Slough Reserve, the remains of hulking eucalyptus trees that blanketed the ground in a thick layer of aromatic wood chips.

ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as they’re published. This year at ProPublica, we’ve paired computer modeling with ...