Today we think statistics are the enemy, numbers used to mislead and confuse us. That's a mistake, Tim Harford says in The Data Detective. We shouldn't be suspicious of statistics-we need to understand what they mean and how they can improve our lives: they are, at heart, human behavior seen through the prism of numbers and are often "the only way of grasping much of what is going on around us." If we can toss aside our fears and learn to approach...